BoomFlop, I went to the Hammer website, and looked at the 121 grain bullets. It says 1-8 twist minimum, so I'm going to go with your recommendation, and that of several other people on this forum, and I'm going with the 1-7.5" twist. According to some people, I shouldn't be relying on others opinion, however, I'll just leave it at that. I have alot of faith in people on this forum. Heck, another member here, has my 6.5-06 as we speak, giving it a cerakote bath, and engraving the barrel, so I think I'm safe here. Thank you and everybody else for yet another educational experience.Still believe in Iowa with an average elevation of ~1000 and weather conditions of approximate 30 degrees, I’d take a 1.94 over 1.49.
If you took out the 121 gr Hammer, then I think a 1-8 twist would probably be fine, but would probably error on the side of a 1-7.5.