02-04-2012, 07:27 AM
LRRPF52 Wrote:I have ordered a bunch of 5.56 barrels from ARP, but I wish he would just use the Grendel chamber, and not some other variation.
I think the way he set it up will work great, will take any factory ammo well, the .297 neck is where it is not too tight like some said about the LBC, and the barrel uses. AA and others use a compound throat angle, whereas ARP will use a 1.5 degree throat angle. I think this design will allow for higher pressures up towards 60K.