Category Archives: Firearms

10mm Carbine from Hi-Point

Stop laughing already…

Here’s the thing, Hi-Point Firearms is unapologetic about offering some of the lowest priced American-made firearms on the market.  But did you know they offer excellent customer service and stand behind the quality of the products they make?  They Do.

Some other gun makers to take a lesson or two from Hi-Point about reliability.  Over and over again I have read reports of reliability tests on these guns the just frustrate anyone who plans to hate them.  They feed just about any ammo and just keep running.  One of my buddies took all the reloads in .380 ACP that failed in his expensive big name guns and ran them through a Hi-Point without a single failure to feed or fire.  That’s a pretty tall order for any gun.

Being probably the cheapest carbine in the market place and being known for reliability will get many shooters to ignore the fact that the guns are not going to win any beauty contests.  Nobody is ever going to checker plastic stocks or engrave a Hi-Point.  But if your looking for a rough and tumble truck gun…  This is it.

In 2018, Hi-Point is adding power to its carbine line with a new 10 mm version that accepts a 10-round single-stack magazine and it’s +P rated. The rubber cheek rest, recoil absorbing stock and a trigger that is at least acceptable, will all contribute to more fun at the range. The 17.5″ barrel has a threaded muzzle with a sight rail for optics  and a lower rail for accessories, dare I refer to them as Pic-rails.   Until this 10mm came along I was not ready to own one, now I will have to add one to the collection.

MSRP: $389.99

 

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7.5 FK BRNO

I was working at the local community college with my associate Robart Schaefer.  We teach a firearms technology course there.  So naturally just about all conversations revolve around guns of one sort or another.  Robart mentioned he had seen a lot of Internet chatter about the 7.5 FK BRNO.  We had a good laugh when you brought up a post from a guy who asked if anyone had heard of the new company B_R_N_O?  He apparently have never heard of the famous city in The Czech Republic that has been producing firearms for at least 100 years.  Thus started a conversation with a lot of laughs that only a gun lover could appreciate.

First off, lets clear up some of the questions that pop to mind immediately.

  1. Is this company related to other well known BRNO companies from the Czech Republic?

Answer: No.  According to John Zent, Editorial Director for American Rifleman, this company has no connection the historical companies of the well known city of Brno in the Czech Republic.

2. What caliber is a 7.5 FK?

75brno

Answer: That would be a 30 caliber for the uninitiated to the Metric world of firearms.

3. What’s it look like?

Answer: A bottle-necked pistol cartridge.

 

Cartridge

Bullet Weight Velocity (fps) Energy (ft. lbs.)
5.7×28 40 gr. 1685 252
221 Fireball 40 gr. 3200 910
9mm Luger* 50 gr. 2000 454
460 S&W 200 gr. 2200 2150
30 Carbine 110 gr. 1990 967
7.62×25 85 gr. 1630 697

7.5 FK

100 gr.

2000

888

*Specialty ammo from Liberty Ammunition

The first article about this cartridge that caught my attention was an American Rifleman story by John Zent titled, “Worlds Fastest Pistol– 7.5 FK Brno”.  This was where Robert and I started kicking cartridges back and forth.  30 Carbine was the first cartridge that really came to mind as the AMT Automag III had long ago had this slot pretty well locked up, if velocity was the only measure.

So is it the Worlds Fastest?  I guess you will have to break it down for yourself.

Most shooters will also look at bullet weight and therefore energy numbers to determine the true value of a cartridge.  Available guns, ammo and their price ranges also enter into the discussion.  Of course the inevitable question of revolver vs. semi-auto comes into play as well.  For me the question of stopping power is a bigger concern if this is going to be a self defense gun.

In the buzz around the 7.5 FK BRNO pistol is a point that will limit the number of buyers for this gun.  Prices in several articles have suggested that the gun will sell for around $5000.  If that is the case the audience for this gun will be small.

It’s highly likely that custom pistol makers will offer guns with custom barrels in the 7.5 FK chambering.  4D Reamer Rentals LTD (our sponsor) has already ordered in the reamers and gauges for this cartridge.

7_5 FK vs 30m1

30 Carbine vs. 7.5 FK

As of this writing the pistols and ammunition are supposed to be available from at least one U.S. retailer: https://luxuryfirearms.com/ They are holding the pricing pretty close to the vest, so most folks would infer that the high prices that have been reported in other articles are probably correct.

Want to build your own?  You can rent the reamer and gauges here.

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Filed under ammo, Firearms, Pistol, Shooting

20 Nosler

Yes, it’s on the way…    How do we know?  Click here. It’s pretty obvious.   Well that and the fact that SAAMI has published the specifications already.  The same print from SAAMI comments that a 32 grain bullet will go 4100 feet per second (fps).

Like the 22 Nosler the 20 is based on the 6.8 SPC case or 30 Remington depending on how you view it.  They both have rebated rims so as to fit in a standard AR-15 Bolt face.

The 20 Nosler will have about eight (8) percent more case capacity by water weight than  the 204 Ruger.  So is the velocity claim of 4100 fps realistic?  On Nosler’s own pages they show the 204 Ruger doing that velocity with the same bullet, so I would say, sure, it just means you will have short barrel life if you load to that level.

It’s long been know that velocities approaching 4000 fps are hard on barrels, the throat is erodes much more quickly regardless of the bullet diameter.  I foresee the barrels for this caliber being chrome washed or Melonite® teated simply to increase barrel life.

The 20 Nosler might have some loading flexibility that the 204 does not in that if you loading for 3500 to 3800 fps there are probably a few more powders that will get there with the larger case capacity.  One thing I noticed in looking for comparisons, the 20 Nosler falls in its own class in terms of case capacity, the 20 BR has just a couple of grains less capacity, but it’s not designed for the AR platform.  The other popular wildcats in this general class either have a fair amount less capacity, or a lot more.  If for no other reason, this cartridge will have a following just based on the case capacity.

There is certainly no doubt, this will be a flat shooting varmint cartridge that will do the job in the dog town or out taking coyotes.22NoslerVs20Nosler

Nosler™ is a trademark of  Nosler Inc.  Most likely Nosler will release this cartridge at SHOT Show 2018.  Watch for updates here.

 

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6.5 PRC from Hornady

6.5 PRC (Precision Rifle Cartridge) Hornady® introduced this new Short Magnum cartridge in the fall of 2017.  Gone are the days when such announcements were limited to the SHOT Show.

Factory ammo offerings in both a “Match” version (with 147gr ELD) and a “Precision Hunter” version (with 143gr ELD-X bullet). You can bet that in the future, Hornady will offer 6.5 PRC brass separately for hand-loaders, but it takes time to fill the pipe line with ammo and meet the initial demand.  6.5 PRC brass  is available right now from GA Precision at $86.00 per 100 cases. GA Precision’s George Gardner, who helped develop this cartridge, has posted: “It’s a non-rebated short mag based on a short RCM [Ruger Compact Magnum] case.”  It has 3-4 grains less capacity than the 6.5 RSAUM, so, the difference in ballistics will likely be 30-50 fps deficit as compared with the RSAUM.

The 6.5 PRC Match is aimed at the PRS (Precision Rifle Series) crowd and long-range tactical shooters. Hornady says the 6.5 PRC is, “designed to achieve the highest levels of accuracy, flat trajectory, and extended range performance in a sensibly-designed compact package. Utilizing moderate powder charges that result in repeatable accuracy, low recoil, and reasonable barrel life, the 6.5 PRC produces high velocities for target shooting with performance well beyond 1000 yards.”

https://player.vimeo.com/video/238317492

New 6.5 PRC is a short magnum that requires a magnum bolt face.  It’s dubbed the “big brother” to the 6.5 Creedmoor, the 6.5 PRC fits in short or medium actions with a standard magnum bolt face (.532”).  Much of the Creedmoor appeal is it’s ability to function in the AR-10 platform.  The PRC will have non of that.

Ballistics charts from Hornady’s 6.5 PRC page shows a muzzle velocity of 2910 FPS. That’s not much better than a 6.5 Creedmoor (which can push 140s over 2800 fps), and the venerable 6.5-284 pushes similar bullets at about the same velocity as the new PRC.  The 6.5-284 utilizes a standard bolt face and you can get Norma and Lapua brass for it.  The PRC will work better than a 6.5-284 in a short-action magazine.  An awful lot of 6.5-284 fans put them on 30-06 length actions so they can seat the bullets out — that may be what Hornady is thinking with the new cartridge…

It looks like this is an attempt to attract some of the PRS crowd and help Hornady visibility in that highly popular arena.  Unfortunately for Hornady there is a trend among top PRS competitors toward smaller cartridge with less recoil. The benefits of less recoil are probably more important to those shooters than a flatter trajectory, which has a cost in both noise and recoil.

Reality is there is a market for everything, there will be some shooters who are very excited about this new offering.  GA Precision, Gunwerks, PROOF Research, Stuteville Precision and Seekins Precision are among those already chambering for this cartridge.  Truth be told, everything in the ballistic equation is a trade off.  A flatter trajectory and shorter time of flight have value too.

6.5 PRC Ammunition for Hunters — Also New for 2018
Hornady will also sell a version of 6.5 PRC ammo design for hunters, naturally that is about the bullet selection being appropriate for the application.  After looking this cartridge over and where it fits in the market place, it might have been better for Hornady to partner with Ruger and call it the 6.5 RCM, since that’s really what it is. This cartridge seems a little like the reason that Baskin Robbins has 31 flavors… try to please everyone and by so doing sell more product.

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224 Valkyrie introduced by Federal Premium

Federal Premium® has announced introduction in time for the 2018 SHOT Show, a new cartridge designed to capture market in the popular MSR (Modern Sporting Rifle; Don’t you hate all these acronyms…) AR-15 platform.    The cartridge is design to capture the hearts of long-range precision shooters. The 224 Valkyrie produces flat trajectories, and  claims match-grade accuracy and supersonic velocities beyond 1,300 yards downrange.

“It beats the ballistics of all other MSR 15 cartridges, including the 22 Nosler, 223 Rem. and 6.5 Grendel. Plus, it offers comparable performance to larger rounds like the 6.5 Creedmoor, with roughly half the felt recoil—and at a more economical price,” explains Mike Holm, Federal Premium Centerfire Ammunition Global Product Lane.  “The 224 Valkyrie is based on a 30 Rem./6.8 SPC case necked down to .224 caliber,”

Shooters can review the technical specifications for the new round once it is approved by the Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI) which is expected in January at the 2018 SHOT Show in Las Vegas. At that time, information such as chamber specifications and cartridge pressure standards, proof pressure range and barrel length/twist recommendations will be communicated. Cartridge and chamber drawings will also be available soon after SAAMI approves the cartridge for standardization.

Testing conducted by Federal Premium engineers using 24-inch test barrels with a 1:7 twist revealed the 224 Valkyrie offers up to 128 inches less drop and 69 inches less wind drift (with a 10 mph crosswind) at 1,000 yards than other MSR 15 rounds. The new cartridge also offers significant advantages in velocity and energy.

Print

Courtesy of Federal Premium®

The 224 Valkyrie will initially be available in four loads: 90-grain Gold Medal Sierra MatchKing, 60-grain Nosler Ballistic Tip Varmint, 90-grain Fusion MSR and 75-grain American Eagle TMJ. These proven Federal Premium bullet offerings provide options for long-range competitors, target shooters and hunters pursuing game from varmints up to deer-sized animals.

Federal created a new 90-grain .224-caliber Fusion bullet specifically designed for hunting deer sized game. In a test barrel the 90-grain Fusion exits the muzzle at 2,570 fps. This is going to be the thumper that P.O. Ackley pushed for 50 years ago. He stated back then that a “bullet of the CORRECT DESIGN AND CONSTRUCTION” was necessary for such cartridges.  Such bullets have not really been available until recent years.

224ValkyrieVs22_250

224 Valkyrie ammo dimensions estimated from reamer print.

Federal Premium engineers designed the 224 Valkyrie for gas-driven MSR 15 actions, bu it’s also extremely effective from bolt guns. “You can also buy a new upper and use it with your existing lower. A gunsmith or other person trained in building MSRs can also make the necessary modifications. The easiest way for shooters to capitalize on the new cartridge is purchase a firearm from one of the many gun makers jumping on the 224 Valkyrie bandwagon,” says Holm.

Reloading data will be available in spring of 2018, when SAAMI releases it’s specifications.  Reloading die sets will be available from RCBS, and other ammo-building components will also be offered by several popular brands.

There are nearly 20 gun makers who have already started producing guns for the 224 Valkrie.  So if your hoping to try one out, it should not be hard to locate a gun in your local store before long.  4D Reamer Rentals LTD has already bought reamers and gauges for this new cartridge, in stock even before SHOT Show.

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Engraving Class for Beginners is part of the FVCC Short Term Gunsmithing Program for 2018

So you like guns and you have always wanted to try engraving.  Here is a chance to learn from one of the best.DianeScalese100

Basic hand Engraving,  Instructed by:  Diane Scalese

One week long non-credit class  Monday-Friday, June 18-22, 2018

 This course is designed for the beginner engraver or for anyone who would like to review the basics of engraving in steel.  Starting with proper tool preparation, learn the basic steps to single point engraving.  Topics include:

*Proper tool preparation                  *Graver shaping and sharpening

*Shading                                                    *Background treatments

*Metal inlays                                            *Business practices

*Transferring patterns                         *Basic lettering

*Basic scroll design and discussion of the most popular styles

Engrave on steel practice plates.  You will need to supply your own equipment.  The course is designed for using air-assisted equipment and power hones.

Instructor, Diane Scalese is a full-time engraver and has been engraving trophy belt buckles, saddle silver, bits, spurs, jewelry and firearms for nearly 30 years.  She was named Engraver of the Year in 2003 by the Academy of Western Artists.  She resides in Big Sandy, Montana.

sweetw_frgr_spur     

This class will be available for online registration in January, 2018

For more information or to register,

call the Continuing Education Center @ FVCC (406) 756-3832

This class is part of the Short Term Gunsmithing Program @FVCC, for a full listing of classes for 2018 click here.

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Short Term Gunsmithing Program Returns to FVCC!

First class to be offered in the updated program of Short Term Gunsmithing classes will be Taming Wildcats, taught by Fred Zeglin at Flathead Valley Community College (FVCC) in Kalispell, MT.

This class will be offered during the Christmas Break, January 2018.  This is a one week class, non-credit.  Students learn the particulars of designing a wildcat cartridge.  Factors like the gun it will be used in, pressure, headspace, how to form brass are all taught.  Students also make reamer and reloading dies for the cartridges so they can experiment with the information they learn.Wildcat Cartridges by Fred Zeglin

If you are interested you need to know how to run a manual lathe and mill.  Fred has taught this class many times and students always come away surprised at how much they learn in just one week.  This class was the reason Fred wrote his book on Wildcat Cartridges.

This is just the first in a new Short Term Gunsmithing program to be offered in the summer of 2018 by FVCC.  Watch the Continuing Education pages for more classes soon.  This a  fun way for both hobby and professional  gunsmiths to build their skills and enjoy firearms even more.

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Reloading A to Z, from AGI

Guest Blog By Jack Landis

Showing case changes

Explaining how cases are changed when fired.

AGI Tech Services
Manager and Editor, GunTech Magazine

One of the questions I have most often fielded from AGI students and prospective students over the last several years is; “When are you folks going to do a comprehensive reloading course?”

Well, the stars finally aligned and we convinced Fred Zeglin to take the few weeks he had off between the courses he was instructing and his latest writing projects to use his impressive knowledge of reloading and cartridge design to teach this course.

Fred has an extensive background as a professional custom gunsmith, cartridge designer, and author. His books Wildcat Cartridges, Hawk Cartridges, and his AGI instructional video course, Taming the Wildcat are well worth studying by students of the subjects.

This new course is almost eight full hours of the information any reloader needs to know. As he says in the introduction, “There is something for everyone here. If you’ve never handloaded, everything you need to know to assemble safe, effective handloads is here. If you’ve loaded for years, odds are you will still find out things you never knew, considered, or completely understood.” Let’s take a look at what’s actually under the hood . . .

Disk 1 – Brief History of Reloading: This is no exhaustive history of every step in the evolution of loading firearms and cartridges, but rather a concise explanation of how we got to what we actually do today.
Reloading Components: Here Fred shows the various types of cartridge cases, bullets, primers, and powders. He explains their differences and the reasons why those differences exist. Why are spritzer bullets pointed?
Why are some powders shaped like little rods?
Ignition Theory: What happens from the moment the firing pin strikes the primer to the exit of the bullet from the barrel is carefully explained and shown in drawings.
Pressure Curves: A PressureTrace Internal Ballistics System is used to show the real-time gas pressure rise and fall from primer ignition until the bullet leaves the barrel, approximately 1.5 milliseconds. Fred draws curves
which demonstrate what the pressure curves would look like in the Fred Zeglin, Cartridge Designer
case of a dramatic overload, high pressure caused by an over-length case, and powder detonation which can
occur if a very small charge of slow burning powder is used in a large case.
Resource Books: Fred explains why the Cartridge Comparison Guide belongs in your library as well as other books
that give you information on a huge number of cartridge’s dimensions, shapes, ballistics, and terminal performance. The reference books discussed will help you decide what cartridge you might want in your next gun.
Reloading Manuals: Reloading without these “must have” sources is like driving with your eyes shut, a real recipe for disaster. You need more than one so you can cross reference loading data to make sure the load you are
contemplating is safe.

Disk 2 – Developing a load plan: What IS a loading plan and why do you need one? Have you
decided what the load you’re thinking about creating is supposed to accomplish? Do you have a purpose for loading it? What is it? Is it reasonable?

Powder and bullets shown

Selecting correct components for your load plan.

He explains to you why you shouldn’t be “That guy” who just searches for the hottest published load for his cartridge and doesn’t “Waste time” with Starting Loads. “Hey, if it’s published it’s safe, right? These guys always leave a safety
margin, right?” Why you need to keep a complete notebook recording loads, velocity, accuracy, etc.
The Bench: Where should it be, how should it be constructed, how sturdy does it have to be, how high should it be, and why. Press and Die Set-up: Learn how to properly set up the dies, shell holders, and decapping pins from a two die set in your press.

Prepping the Brass: Cleaning, Reaming Inspection: Why you need to clean and inspect your brass, chamfer ream the case mouth and clean out the primer pockets.

PressureTrace Internal Ballistics System
What’s in a “Complete loading kit?” Fred opens a big box from Hornady that contains everything you need to load quality ammo, other than cases, primers, bullets, and powder. Why these make sense for the beginner.

Lubrication: Fred shows you several different methods and products to lubricate the cases prior to resizing, and
why you need to do it.
Full-Length Sizing Dies vs Neck Sizing Dies: Ever wonder what the hoopla about neck sizing from accuracy buffs is all
about? Fred explains why you might want to do it, what makes you able to do it continuously with some cases, why you’ll have to eventually full-length size, and how to avoid “Over-sizing.” Do you know what guns you should not only
never neck-size for, and moreover why you’ll need a “Small base” die? What IS a small base die?
Sizing the Cases: By this time, you will be all set to make those cases like new again.
Priming the Cases: Fred shows you four different priming methods, and why some are better than others in his opinion.
Measuring the powder: Several different scales are shown and how to set them up. After that Fred dips, throws, trickles, weighs, and finally stands and watches a machine do it all.

Disk 3 – Charging Cases: Now we actually begin to load cartridges. Attach the powder measure to the press, verify it is throwing the correct weight, adjust the die so the case is just partially re-sized, and dump the powder into the case. Watch Fred set-up the bullet seating die for no crimp, set the bullet on the top of the case and feed it into the die, adjust its seating depth, and . . . voila!! A real live reloaded round of ammunition made by your very own self.
Seating Bullets with a Crimp: Here you will learn how to set the seating die so it will crimp the case mouth into the bullet’s cannelure just as the bullet reaches the correct depth, and why and when you sometimes need to do this.
Using the Lee Loader: Robart Schaefer demonstrates the use of the basic Lee Loader. Many of we “Senior” reloaders started with one of these tools. It gives you everything you need to load one caliber of good quality ammo for ~ $28. Just supply brass, bullets, primers, and powder. The box holding the tools will fit in the back pocket of your jeans, assuming you don’t fill them as full as some of us.
Fred at the bench demonstrating proper die set up
Next up is Robart Schaefer again, this time with the Lee Hand Press. This is basically a bench type press that
you can use sitting in your La-Z-Boy while watching football. And I have. While it won’t full length resize large
cases, it will do everything else. I probably used it more than anything else with a Lee decapping die, got
my youngest to do a bunch too, and then primed those cases with a Lee Auto Prime. Yep, thousands of them. Got them both for under $50 more than a couple of years ago.
Reloading Cartridges with a Three Die Set-up: Fred explains the use of three die sets. The third die is used to bell the mouth of straight wall cases and pour the powder charge through into the case.
Annealing Brass: Working (sizing) makes it hard and susceptible to cracking. Heating it softens it again and allows more loadings. Fred shows how to do this and gives several alternatives and cautions.
Case Trimming: Here’s where you learn how to trim those over length cases back to the correct size with a couple of different tools and ways of measuring.
Additional Case Prep Procedures: Learn about vibrating, tumbling, and ultra-sonic case cleaners. Learn how and why we uniform primer pockets and flash holes.
Reloading Cartridges Using a Progressive Press: Fred demonstrates a progressive loading press, and describes what happens, and how, at each station.
Disk 4 – Tools and Accessories: Fred wraps up the cartridge reloading portion with a “Show and Tell” of some specialty tools that will make your reloading easier. Shown are extended shell holders to ease the loading of really short cases, a competition shell holder set whose heights vary by .002 inches to allow you to set the exact amount of case sizing you want, powder measure baffle and drop tube, and neck lubers for neck sizing. Specialty dies include neck sizing dies with interchangeable bushings to adjust neck tension, Lee Factory Crimp dies, in-line feeding and micrometer seating
dies, and bullet pulling dies. An impact bullet puller is demonstrated as well.

Bullet Casting: Robart tells us why we should consider casting our own lead bullets and shows what tools and equipment are needed for the process.

Lead: What kinds of lead alloys are needed, where to scrounge what you need, or buy it pure or ready alloyed
if all else fails. The characteristics of the various alloys are discussed and their uses explained.
Pouring Ingots: How and where to heat your lead safely, why and how to flux, and cleaning the dross off the top. It’s kind of cool to see the steel wheel weight clips floating on top of the lead. How to pour the cleaned and alloyed lead into
smaller, easily handled ingots . . . into what looks like corn cob shapes in a jello mold. Why you can never have water around hot lead.
Casting Bullets: Now we get down to actually pouring lead into the molds. How to tell by looking at the bullets whether the lead, mold, or ladle is too hot or cold. He pours from a ladle into the top of single and double molds, and from the bottom into a six bullet mold.
Testing Hardness: Here is a tool the tests the Brinell hardness of the cast bullets and explains how you can determine how hard they have to be based on the chamber pressure of the cartridge they are going to be fired from.
Sizing and Lubing Bullets: Why cast bullets need to be sized and lubed after casting, and how it’s done. What to use for bullet lubes is a choice made based on the bullet’s expected velocity The Lube Sizer Press: This press has a heating
element that heats the lube before it deposits in the lube grooves, seats a gas check, and sizes the bullet, all in one
smooth stroke of the handle.

Final Thoughts on Bullet Casting: Robart wraps up his discussion of bullet casting with a reiteration of why it’s a cool thing to do, and repeats the cautions earlier expressed. Have fun and be safe!

Epilogue: Fred closes by showing a bullet neck concentricity gauge and explains what it tells you and why it is important as a lead-in to a discussion of why learning even more advanced techniques can improve your abilities as a reloader and shooter. If you have never reloaded a single cartridge, you can do so with success and confidence after watching this video course. You will also be able to make informed choices on what tools and equipment will fit your needs and budget.

As a bonus, AGI put Darrel Holland’s Advanced Reloading Techniques course in the package too!

Reprinted courtesy of Hot Brass Magazine

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5.56 x 45 (Nato) vs. 223 Remington; The Ongoing Saga

The subject of 223 Remington vs. 5.56×45 (5.56 Nato) is a popular source of discussion.

Probably one of the best blog posts on this subject can be found at http://www.luckygunner.com/labs/5-56-vs-223/

One item this and most of the discussions seem to overlook is headspace.  Since this blog leans more toward gunsmithing subjects, I wanted make sure this subject was discussed.   I often hear from clients that the 5.56 and the 223 differ in headspace.  The truth is, when I checked the various gauge makers they are all working to the same standard.

Why is this important?

Mainly because educating the shooting public minimizes accidents and makes life easier for all concerned.  None of the articles I looked at mentioned headspace.  Most of the chamber dimensions being shared do not include headspace dimensions.  This may be in part because they are so hard to locate for the 5.56 Nato.

Forster Products publishes the data for their 5.56 gauges.  Minimum headspace (Go gauge) is 1.4636” according to their specifications with a tolerance of -.0003”.  With the Maximum (Field gauge) measuring 1.4736”; that’s 10/1000s of an inch longer than the go gauge.  Most No-go gauges would be set .004” to .006”  longer than the Go gauge.  The Pacific Tool & Gauge print shown here uses a Go gauge that measures 1.4636”.

5.56 Nato Print

Look at the Minimum Headspace dimension listed on this print, it is identical to the dimension used on the 223 Remington.

SAAMI specifications for the 223 Remington show a Minimum headspace (Go gauge) of 1.4636” identical to the military spec for the 5.56×45.  The Nato round is not a SAAMI cartridge, so they do not provide prints or specification for it.

My curiosity as to why so many shooters think there is a difference between the gauges for these two, led me to do an Internet search to see what people are reading.  I consider all material on the Internet to be of dubious quality until I can confirm the data through trustworthy sources.  What I found was interesting; you have to dig deep to find anything that pertains to headspace and the 5.56 Nato.

What is easy to locate are drawings which purport to show why the two cartridges are not the same.  The dimensions  they are concerned with mostly have to do with the junction of the body and shoulder plus the shoulder and neck.  In the real world the camming action of the bolt closing would be more than sufficient to deal with the tiny difference that might exist in the brass.  Frankly there is more variation in tolerances allowed that these drawings account for, in short, it’s all smoke and mirrors.

One Internet source shows the Military gauge .001” longer than is found in the prints mentioned above.  Even if that were the case, that is only 1/5th of the difference between a standard Go and No-go gauge for the 223 Remington.  To be totally clear, it would make NO difference.

Conclusion:  Headspace gauges for the 223 Remington and the 5.56 Nato are identical.  The differences between the cartridges has to do with case wall thickness and how they are loaded.  If you want to shoot either type of ammo in your gun, rechamber it to 223 Wylde.  The Wylde chamber is designed to work safely with both types of ammo.

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Getting Ready for “This Season”

It’s that magical time of year when hunters start saying, “This Season” instead of “Next Season”.

Upgrade, try a new caliber.

Upgrade, try a new caliber.

Across the west every year when the big game draw results become public hunters start to plan for their fall trips.  Once you know the results of the draw it’s time to assemble the gear and goodies you will need for a successful hunting season.

The problem is eternal though, that for most sportsmen we are still fishing, boating, hiking, camping and doing all those summer time activities with family and friends.  It’s difficult to turn your attention to fall plans when you’re so busy having fun in the outdoors.

Doing just one small thing can greatly aid in your fall preparations and takes only a few minutes out of your summer.  Last season either you gun broke or you decided it needed an upgrade before next season.  Well, next season is now this season.  Grab that gun from the safe and get it to the gunsmith now.  You can avoid the seasonal rush and be much more likely to get your job done before the fall hunt is upon you.

Fall is just around the corner

Soon you will be glassing for that buck.

It takes time to get in parts or barrels to upgrade your firearm.  Leave time for the gunsmith to acquire the parts you want.  Many gunsmiths I talk to even offer specials this time of year to encourage bringing projects in early.

So drop your gun off now, so you can get back out there and enjoy the summer.  Then when fall hits you will have that new barrel, scope, stock, trigger or whatever you need to be more successful on you hunt this fall.

Now go have some fun!

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Filed under Firearms, Gunsmithing, hunting