02-09-2017, 06:17 PM
Rickc Wrote:Wonder what the velocity gain would be with an ackley improved grendel
My 6mm turbo 40 has a blown out shoulder of 40 degrees and a much shorter neck than the original grendel case
Suprised someone hasn't already done it
I've thought on it some!! Lol. I love an AI cartridge. I don't think the factory ammo will fire in the max chamber. Seems to me gruff was necking up then back down to 6.5 leaving .050" of neck to act as a false shoulder.
Richard
Member since 2011, data lost in last hack attack

