08-22-2011, 09:46 PM
I would say you're properly-gassed, and under-weight. Manufacturers need to cut gas ports for reliability, while the customer can tune the recoil and gas system to the loads they might end up favoring. The Grendel is a fun gun to load for and shoot, and the AR is the most versatile firearm design with market support and user-configurability. It's the big boy's erector set...that also spits bullets.
I would get either an M16 weight bolt carrier or carrier weights from Tubbs, and a heavier buffer. You could also have someone like Warped provide you with a proper weight buffer for the Grendel. I've used a Spike's ST-T2 tungsten powder-filled buffer on my 16" Grendel from the start, and have had zero issues of ejection or extraction with mild to hotter loads, in the 123gr, 120gr, and 100gr bullet weights with several different powders. I use an M16 bolt carrier, standard carbine recoil spring, and plenty of Slip 2000 EWL.
I would get either an M16 weight bolt carrier or carrier weights from Tubbs, and a heavier buffer. You could also have someone like Warped provide you with a proper weight buffer for the Grendel. I've used a Spike's ST-T2 tungsten powder-filled buffer on my 16" Grendel from the start, and have had zero issues of ejection or extraction with mild to hotter loads, in the 123gr, 120gr, and 100gr bullet weights with several different powders. I use an M16 bolt carrier, standard carbine recoil spring, and plenty of Slip 2000 EWL.