+P chambers

[David Milisock]

So I'm throwing this out here and I'm going to be very blunt about it.

Here is my stance on +P chamber throats. You're cutting away the height of the lands as well as making the throat longer as I understand it and from what I've seen in several barrels (one barrel the throat was another .750" longer) customers have sent back to us. So guys think they can run a heavier powder charge etc... to get more velocity and keep pressures down. Ok fine but by doing that you can expect it to have a negative impact on barrel life/accuracy.

This is another variable beyond our control. You want to put a bigger camshaft in your cars engine and a bigger carburetor I get it but then you add nitro methane in your gas tank our put nitrous on it as well to go even faster.... there is a trade off for going faster. You don't get to eat your cake and keep it to.

So I've told all my guys in the office here... I will not warranty any barrel that a customer thinks the barrel died early etc... and they are running a +P chamber set up.

Later, Frank
Bartlein Barrels

Some peoples children! I have 2 custom throat rifles, one was made by the barrel maker and one was a 3rd party barrel supplied to the smith. Both rifles had dummy rounds supplied to the smith loaded with my projectile.

In the case where the barrel manufacturer was the smith I expected he would warrant his work. In the case of the 3rd party barrel I expected the Smith to warrant his work. I.E. if the Smith screwed up the barrel he replaced it. If the Smith thought the supplied barrel was bad I expected the barrel maker to warrant it.

Both worked out fine, both are run at 60,000+ PSI so barrel life is my problem. I have rifles that run at 44,000 PSI and 52,000 PSI, I expect those barrels will out live me. I have a few run at 65,000 PSI they're out live me because they get shot 50 to 100 times a year and I'm 70.