I sent Charlie an email, but maybe you guys can help me out a bit. Can I use the same gas checks for both .308 and for 7.62x39? I realize that one is .309, and the other is .312.

Will the gas checks made for .312 swage down to fit on a .309 bullet as well?

Can I use a .309 FreeChex III for .312 bullets? I'm not sure what they end up as coming out of the tool. I assume that they are a bit oversized so that they swage onto the base of the bullet slightly when sized.

I'm trying to avoid buying two FreeChex dies for basically the same caliber.

Thanks