I had thought that a 22 CM would be cool. We machined a 1-8" twist 22" 22-250 barrel for my DTA. I'm getting as fast as 3300 out of an 80 grain SMK at about 1/4 MOA at 100. It is crazy fun out to 1000 yards. However, I am not expecting much in the way of barrel life.
Having said all of that, I...