Discussion in '6BR, 6BR Improved & Wildcats' started by P1ZombieKiller, Nov 8, 2019.
what is the most used chamber neck diameter
I have a 30 br and a 300 blk
in 30br undisputed .330 chamber.....
I suspect in 300 blk out.... SAMMI is mostly used due to the fact that not too many custom 300 blk out chambers are around. I happen to have a custom 300 blk out chamber, and it is a .337 neck chamber.
Doesn't that form a donut upon firing?
331 is my soon to be 30br
My 30br I'm waiting for is also a 331 neck
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