i'm going to build my next 6.8 and want a DMR type rifle with a 20" barrel. it needs to be able to stabilize the 120 Barnes solids. Bison has 11 twist barrels with a rifle gas system that look good. any others out there. i looked at extreames due to all the good talk but they are all 16". it's either that or i build my own. i would hate to have to chase down a reamer and such but would happily do it to get what i want. so the basic question is this. Bison the only game in twon? are they good enough for what i want to do?