Re: 6.8mm Rem. SPC
Charles is correct. The ballistics are pretty close to the old 6.8 Pederson round that John Garand originally designed the M-1 around. I've shot a couple 6.8SPCs in M-4 configuration. Ammo quality is still iffy. Some very good, and some, well, back to the drawing board. Standard M-16 magazines won't feed reliably at capacity. A different follower is necessary. They are doing well overall in the hands of our finest, but the bolt lugs are sometimes shearing off on full-auto.[img]/ubbthreads/images/graemlins/mad.gif[/img] There are already several wildcat calibers based on the 6.8SPC.