A barrel should be inlet up to the center line of the bore, or in other words, half it’s diameter should be below the wood line. All too many new gunsmiths and hobby gunsmiths just inlet until they can get the screws into the action and call it good.
There is a simple way to make sure your barrel channel is deep enough so that the bore line will be aligned to the top of the stock. Take a square and place the outside 90 degree corner of the squared into the barrel channel. If the square touches on all three sides then the barrel channel is a half circle.
If the point at the bottom of the barrel channel touches and keeps the sides from contacting the top of the stock then your too shallow. Conversely, if the point of the square does not touch but both sides are in contact with the top of the stock then your past 50 percent depth.
Fred Zeglin is working on a series of booklets, “Gunsmithing Student Handbook Series”. This little how-to tip is just one peek into the upcoming books. What gunsmithing tips would interest you?
We reported on this gun when Miller Precision first introduced it on July 4th,2012. More recently they displayed the MPA300 at the SHOT Show, 2014. At Media Day they had several rifles there ready for writers to test.
Not too surprising, the writers all wanted to shoot the 300 Winchester in favor of the other models in 308 Winchester and 5.56 Nato.
The MPA300 has the distinction of being the only 300 Winchester Semi-auto on the market that is truly on the AR platform. While the upper, lower, magazine and bolt carrier are specific to the MPA, the rest of the parts are all AR-10 interchangeable. So you can dress your gun with any of the various features that are already on the market for the AR-10.
Media day turned out to be a real endurance test for the MPA300. When Brandon Miller saw that everyone wanted to shoot the 300 Winchester almost exclusively, he decided to see how long the gun would run without a cleaning. It went about 2700 rounds before the first malfunction. A quick inspection and cleaning had the gun back at the line and by the time the smoke cleared the gun had fired over 4000 rounds without a second failure.
Actions are machined from billet aluminum. These guys are selling quality, not big-box store discount products. Finishes for the Miller Precision guns are about as varied as you can ask for. Among other things they offer hydrographic coatings, so the choices are almost limitless. These guns are impressive.
Brandon Miller with his MPA300, Media Day 2014
At Shot Show 2014 Cabot Guns made quite a splash with their mirror image 1911 pistols. These two guns were true right and left hand 1911 pistols. The right had all the conventional controls, ie. safety, slide stop and magazine release that we are all used to.
The Left gun however was totally backwards (as you might expect) with the controls on the wrong side of the gun. Which makes sense when you see the scrimshaw by Darrel Morris on the grips. The Left gun has Piers Morgan on the right grip and Obamo on the left grip.
The Right hand gun has Ted Nugent on the left grip and G.W. Bush on the right side.
So when the two guns are muzzle to muzzle you have Morgan facing off with Nugent on one side and Obama with Bush on the other. The display highlights the great American gun debate.
The folks at Cabot Guns obviously have a sense of humor as well as a clear understanding of what will spark discussion. These presentation grade 1911 pistols show off the abilities of the company to produce high grade guns. These guns were the talk of the show, nearly everyone I talked to asked, “Have you seen the Right and Left guns at Cabot’s booth?”
Cabot Guns was launched in 2011. In a short time, the company has won two consecutive NRA National Pistol Championships. The Cabot 1911 has been described as “the Rolls Royce of 1911’s” by S.P. Fjestad, Author and Editor of the “Blue Book of Gun Values.