Well, I did some trading and finally ended up with a 6.8SPC with a 1:10 twist. I've done some searching and reading and it looks like I need to have the chamber bored to SPC II specs. I don't know if it is already done, how would I check?
Also, I've ran into trouble loading the mags. I have six, and all six seem to jam the rounds up while loading. The tip of the ammunition keeps binding on the lip of the mag. I have tried going slow and tapping the mag back after each round, but a new round inserted seems to offset the round underneath and push it forward. Additionally, the rounds seem especially hard to insert. Nothing at all like 5.56. I disassembled and oiled the mags inside and out and then wiped them down. This may have helped a little, but is this normal?
I'm really excited about this new rifle, and look forward to getting to know its capabilities. Thanks!