Monthly Archives: February 2011

What is Cerrosafe™ and How to Make a Chamber Cast.

Cerrosafe from 4D Reamer Rentals LTD

CERROSAFE™ alloy was originally made for toy soldier castings. One of its most popular uses today is casting to check gun chambers. Cerrosafe shrinks during the first 30 minutes and at the end of one hour is EXACTLY the chamber size. Some other uses are casting cavities such as threads, dies, molds, blind holes, duplicate patterns in foundry matchplate making, support work pieces while machining; spray coating wooden patterns, dental lab techniques, masks for electroplating. Cerrosafe is a non-eutectic alloy with a yield temperature of 162.5º F.

To make a cast, clean the chamber thoroughly and apply a very thin film of oil or graphite. Plug the bore immediately ahead of the throat with a small cleaning patch – but not so tightly it cannot be driven out. If possible, pour the molten alloy through a small tube into the bottom of the cast, gradually removing the tube as the chamber fills.  We recommend that you warm the barrel to just above room temperature before making the cast. When cooled, remove from chamber, using a rod or dowel from the muzzle end of the gun.
Cerrosafe shrinks during the first 30 minutes of cooling and then at the end of an hour, is EXACTLY chamber size. At the end of 200 hours it will have expanded approximately .0025″. This factor is known to reamer or die makers and they will take it into consideration when making dies, reamers, or gauges from your casting – just tell them the cast is of Cerrosafe.
Cerrosafe is reusable, and never wears out.  It provides excellent casts of chambers and will save you from costly guess work.  Identification of chambers is simplified by a clean chamber cast that you can measure and rely on.
Cerrosafe melts between 158° – 190° F. This alloy should be melted in a clean, iron ladle. Source of heat should be removed as soon as the alloy is completely melted, at which time it is ready to pour. Solidified castings should be removed from the chamber before, or when, it cools to room temperature. Cerrosafe should not remain in the mold more than an hour, as it will grip the chamber walls and be difficult to remove.
Just a few minutes work, for reliable results.

4D Reamer Rentals LLC sells cerosafe in 1/2 and 1 pound ingots.

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Wyoming may join Alaska, Arizona, and Vermont in returning rights to Law Abiding Citizens.

Wyoming Legislature Approves Permitless Carry Bill

http://www.nraila.org/

Law-abiding Wyoming residents were big winners this week when both chambers the Wyoming Legislature overwhelmingly voted for a permitless/“constitutional” carry bill. When signed into law, Wyoming will become the fourth state to recognize permitless carry, joining Alaska, Arizona and Vermont.  Similar bills are under consideration in other states across the country including Colorado, Idaho, Montana and Utah.

The concept of permitless carry, where law-abiding residents are allowed to a carry a concealed firearm without permits, has been gaining popularity across the country as more people realize that despite their best intentions, law enforcement cannot be there at the precise moment a crime occurs to prevent the attack.  Furthermore, as state and local governments wrestle with massive budget shortfalls and are forced to lay off law enforcement and furlough prisoners, citizens realize that help will likely arrive later as the odds of a crime occurring increase. The NRA has also always believed that there should not be a tax associated with self-defense and the opportunity to carry a firearm for self-defense without having to obtain a costly permit, especially during these trying economic times, will be welcomed by many.

The lead sponsors of the Wyoming bill are state Senator Kit Jennings and Representative Allen Jaggi. The bill now goes to Governor Matt Mead’s desk for his consideration.

 

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Filed under Firearms, Pistol, politics, Second Amendment

Atlas Shrugged Movie is coming out in April 2011

Visit the Official Atlas Shrugged Movie Web Site!

Atlas Shrugged was Ayn Rand’s warning to the Free World that certain kinds of politics and economics do not work.  This book written in 1957 has remained popular ever since it was first published.  This is one of those stories that; if you don’t have time to read the book, make time for the movie.   The producer has stated publicly that their intention is to remain true to the book and to Ayn Rand’s characters.  Should be fun, and maybe, just maybe will open a few eyes.

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Renting Reamers Can Be a Life Saver

I have heard many gunsmiths say they would never rent a reamer.  How foolish…  Buying a reamer you will probably only use once is a waste of money.  But, more important even than that is the fact that sometimes time is the most important concern.  Renting a reamer is a fast way to get the tool you need and not poor resources into a stagnant tool.

The reason most gunscranks give for not renting is they figure the tools have to be poor quality.  All you have to do is think about business, profit comes from repeat customers, so no rental place will knowingly send you a bad tool.  Next time you have a client breathing down you neck because you have had a job on the shelf too long, consider saving time by renting the tools.  I always pass this cost along to the client, some shops even mark it up a little.  Probably depends on your client base when it comes to the pricing.

fitting a rifle barrel

Reamer snobs make less money and their rifles don’t necessarily shoot any better than anybody else’s.  Here’s to saving time and making money!

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Interchanging Headspace Gages

Many headspace gages are interchangeable. Cartridges not listed here have their own unique gages and are not interchangeable with other calibers.   This is not an exhaustive list but does cover most popular calibers.

GAGE NAME USE WITH THESE CARTRIDGES
Remington BR 22 BR, 6mm BR, 7mm BR
PPC Gages 22 PPC, 6mm PPC
TCU 6mm TCU, 257 TCU, 6.5 TCU, 7mm TCU
17 Ackley Bee 25-20, 218 Bee
22 Long Rifle 22 Short, 22 Long, 22 Bentz, 22 Match, 17 HM2, 17 HS, 17 HMR
22 RFM 22 Winchester Magnum
22 Hornet Hornet Based Wildcats
218 Bee 218 Mashburn Bee, 25-20, 32.20
221 Remington Fireball 221 Remington Fireball, 221 Wildcats
223 Remington 6 X 45, 5.56 NATO, 17-223
222 Remington Magnum 6 X 47
223 Winchester Super Short Magnum 243 WSSM, 25 WSSM
6mm Remington 244 Remington
25-20 32-20, 218 Bee, 218 Mashburn Bee
7 X 57 257 Roberts, 6.5-257 Roberts, 270X57
280 Remington 7mm Express
284 Winchester 22/284, 6/284, 25/284, 6.5/284, 270/284, 30/284, 35/284
30-30 WCF 19 Zipper, 219 Zipper, 219 Zipper Imp., 219 Donaldson Wasp, 22/30-30, 25-35 WCF, 7-30 Waters, 7mm Int. Rimmed, 30-30 Based Wildcats, 30 Herrett, 303 Savage, 307 Win., 32-40 WCF, 32 Win. Spl., 356 Win., 357 Herrett, 375 Win., 38-55 WCF
300 Savage 300 Savage, 270/300 Savage
30-40 Krag 303 British, Krag wildcats
308 Winchester 243 Win., 260 Rem., 7/08, 358 Win., 25 Souper
30-06 25/06, 6.5/06, 270 Win., 8mm/06, 338/06, 35 Whelen
30 Remington 32 Rem.
300 Winchester Short Magnum 270 WSM, 325 WSM,  (DO NOT USE with 7mm WSM)
300 Remington Short Action Ultra Mag 270, 7mm and 338 RSAUM
300 Remington Ultra Mag 270 Ultra Mag, 7mm Ultra Mag, 375 Ultra Mag 

(DO NOT USE with .338 Ultra Mag)

32 H&R Magnum 32 S&W Long
8mm Mauser 8×57
338-06 30-06, 270, 35 Whelen
348 Winchester (WCF) 45-70, 450 Alaskan, 50 Alaskan
357 Magnum 22 Remington Jet, 256 Winchester Magnum, 357 Maximum, 38 Special
358 Winchester 308, 7mm/08, 243 Winchester
35 Whelen 30-06, 270, 338-06
375 Winchester 30-30, 38-55, 32 Win.
378 Weatherby 30/378 Wby., 460 Wby., 378 or 460 Based Wildcats
40-65 45-70, 348 Win.
44-40 WCF 38-40
44 Remington Magnum 44 Special
45-70 Government 33 Win., 348 Win., 40-65 WCF, 45 Basic (45-120 3 1/4″)
45 Colt 454 Casull
460 Weatherby 378 Weatherby, 30-378, or 338-378
Std. Belted Magnum .535″ Base Belted Magnum Calibers: 257 Wby, 264 Win, 6.5 Rem. Mag, 270 Wby, 

275 H&H, 7mm Rem. Mag, 7mm Wby, 7×61 S&H, 300 H&H, 300 Win. Mag, 30-338,

300 Wby, 308 Norma Mag, 8mm Rem. Mag, 338 Win. Mag, 340 Wby, 350 Rem. Mag,

358 Norma Mag, 375 H&H, 416 Rem. Mag, 458 Win. Mag, 458 Lott.

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Act Immediately to Block ATF Long Gun Sales Reporting!

Time Sensitive!  Act by February 14th, 2011

Act Immediately to Block ATF Long Gun Sales Reporting!
If you’re one of the nearly 71 million Americans who live in the four southwest border states, some of your gun purchases could soon be reported to the federal government. And whether you live in one of those states or elsewhere, your help is needed now to stop the federal government’s plan to register Americans’ gun purchases.

The Bureau of Alcohol, Tobacco, Firearms and Explosives is demanding the authority to require all of the 8,500 firearm dealers in California, Arizona, New Mexico and Texas to report all sales of two or more semiautomatic rifles within five consecutive business days, if the rifles are larger than .22 caliber and use detachable magazines. For example, a dealer would have to tell the government every time a deer hunter in Sacramento or Amarillo finds a good deal on a pair of semi-auto .30-06s like the popular Remington 7400.

The ATF has no legal authority to demand these reports, and the flood of new paperwork will waste scarce law enforcement resources that should be spent on legitimate investigations.

Unfortunately, there are only a few days left to comment on this proposal. Comments will be accepted until Monday, February 14. Every concerned gun owner’s voice should be heard on this critically important issue.

To read the ATF proposal, click here

To read the NRA’s comments, click here.

Please send your comments today. Be sure to refer to the December 17, 2010 “Notice of Information Collection Under Review: Report of Multiple Sale or Other Disposition of Certain Rifles.” You can submit your comments to:

OMB
Office of Information and Regulatory Affairs
Attention: Department of Justice Desk Officer
Washington, DC 20503

Please send a copy of your comments to:

Barbara A. Terrell
Firearms Industry Programs Branch
Bureau of Alcohol, Tobacco, Firearms and Explosives
99 New York Avenue, N.E.
Washington, DC 20226.

Barbara.Terrell@atf.gov
Fax: (202) 648–9640

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Classic Rifle Stock Drawings & How to Use Them

A while back I mentioned a book by Alvin Linden and then a set of Classic Rifle Stock Drawings that are currently available.  The interest in these posts has been high, so this is meant to expand on the previous posts.   What I have posted below is the instructions from the CD on American Classic Rifle Stocks.  I think they will give you some insight into the drawings on the CD and on top of that there are some useful bits of information you can use even if you don’t have the drawings.  Enjoy.sample stock drawing

How to use the Drawings:

These Drawings were assembled to define the parameters of the “American Classic” hunting stock.  Many of the stocks made by novices and even some professionals lack the aesthetics that should be afforded a nice piece of wood.  Worse yet, they are left too large, or cut down too small, either of these conditions will make a stock that has poor handling characteristics and may even add to the felt recoil.  A properly designed stock

Improves handling, reduces felt recoil, and is pleasing to the eye.  It is not our intention here to teach you stock making.

How These Drawings Evolved:

Normally drawings are very specific about dimensions, and tolerances are very tight, not so with these drawings.  You will see that there is a range of dimensions for most measurement.  The reason for this is simple, no two shooters are alike, so you need to be able to adjust the dimensions for the shooter.  Also magnum guns are generally built heavier than standard caliber guns to help control recoil.  The dimensions included here were derived by measuring about 100 stocks from various custom makers, some names you would recognize and some you might not.  So the ideas represented come from a broad cross section of custom stock makers, not just the opinion of one maker.

How do I decide which dimensions to use?

The Caliber of the rifle, and the size of the barreled action will be a major factor in this decision.  A light caliber like 243 Winchester with a sporter weight barrel would likely use the smaller dimensions, because the recoil will be low and handling is probably more important than controlling recoil.  On the other hand, if you working with a 375 H&H you will likely want a heavier stock to help manage recoil.  Grip length and curve may be tighter on a standard caliber where recoil will not bang your knuckles against the trigger guard.  Magnum stocks normally get a longer grip with a more open curve.   Since classic stocks are not generally used on varminters, or benchrest guns excessively heavy barrel tapers do not enter into the question.  However, you will find that much of the data here will apply to other stock designs.   For instance comb height, length of grip, and length of comb are all pretty universal.

I want to use my stock strictly with iron sights, does that make a difference?

Yes, it makes a huge difference.  Looking at the dimensions, you will see that several of the measurements are specified for either scoped or iron sighted rifle.   Use the dimensions for the sight system you will be using as your primary sights on the rifle.

Tricks the Pros use:

Clients want a stock that “fits like a glove”.  To accomplish this, a surprisingly small change is needed.  You will see dimensions for Cast and Cant included in the drawings.  In general, cast off is for right hand shooters and conversely cast on is most often used for left-handed shooters, the same is true of Cant. Grips can ‘Cant’ as well, use the same rule for right and left-handers.  Cant the grip up to about .125” in the desired direction.  This is accomplished by finding the centerline of the stock and then marking the center of the grip canted in the direction desired.

Recoil can be controlled by some simple changes to the stock design.  First, make the butt as large as the design will allow.  Second, use a high quality recoil pad, like the Pachmayer Decelerator®, Kick-Eez®, or Limb Saver®.  The third major method for controlling recoil is making the pitch of the stock neutral.  Pitch is measured as the angle of the butt to the bore line, neutral is 90 degrees to the bore line.  Once the top of the stock along the barrel channel is finished it can be used as the bore line, set the stock upside down on flat table, using a square you can mark the pitch on the butt where you intend to cut it off for the recoil pad installation.  Finally, installation of a mercury recoil reducer in the stock is a great way to control recoil, although it does add weight to the stock.

Each area of the stock should flow smoothly into the next.  Shadow lines if used should be crisp and clean, but not sharp to the touch.  The best way to check these items is to close your eyes and feel with your fingers.  It is amazing how small an imperfection you can pick out with just a touch.

To order the drawings on CD click here. The CD is $19.95 postage paid.

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Filed under Books, Gunsmithing, How To, Rifles, Stocks, tools

Titanium

 

titaniumWe used to call this stuff unobtainium because it was so tightly  controlled, but today you can buy it in many forms.

Titanium Metal Supply, Inc. is big on customer service,  and they have no minimum order.  If you have a project that would benefit from ultra light and strong material like titanium these are the guys to check out as a supplier.

They also provide information about machining titanium that would be extremely helpful to the uninitiated.  Machining-Titanium-Alloys-Reference

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