Re: 190 vs 200smks
No, GAP cut a match chamber in that first 10 twist tube, but she had issues with dirt, hence a different chamber this go round. My 190's (new tube is 11.27 twist)are leaving the muzzle faster than I'd like, but that is were she shoots the best, Gets to 1K right at 22.5 - 23.5 moa depending, mother.
I've some 220smk's left from 30-06 subsonic loading but don't know if the twist is there, I'll give it a shot and see what happens. Hardrock won't kick off until Feb and that will be the first chance at 1K or longer.