Back to the Grendel, I've grown quite fond of handling the medium bore cartridges with a marginal size case such as 6.8 SPC, 6.5 Grendel, and 6mm TCU. I started with them in the contender platform but by a friend's insistence decided to build an AR in the 6.5 G. I build my brass from RP 7.62x39 because it comes with small primer pockets (less brisance). The heavy for bore bullets that I shoot require full utilization of propellant space remaining and small rifle magnum primers. Bill Alexander, it's designer, is a few miles down the road from here operating Alexander Arms out of the Radford Arsenal in VA. Rumor has it he's working on an operation in the nearby Dublin community but that started 5 yrs. ago and they are stilll at the Arsenal today. Enuff chit-chat here's my rifle:
modeled after the .264 LBC Ultimate Varminter
shown here with a custom stainless steel forearm being fitted to barrel nut.