With a 1:9 twist you should be able to run the heavyweights with good accuracy. Watch the lighter weight (50 under) with the fragile jackets, might not make it to the target. Anyway, I ran mine thru it's paces earlier this year, albiet, with 55gr bullets only. (can't do much more load development yet, as a small % of the brotherhood are buying up all the availble primers to look at them sit on their shelf.) With bulk 55gr Rem bullets I achieved so-so accuracy, Until, I bought a pound of Hodgdon H-322, what a difference a powder makes. I got about 100fps less velocity than H-335, another good one by the way, but accuracy was outstanding. A powder that has been getting some press as being accurate is TAC, but I have tried that powder in a number of different rifles and feel I've wasted my time and my Primers on that one. Hornady 55gr V-max shot M.O.A. and under with anything powder I tried, (except TAC) what a difference a bullet makes.
I like the rifle alot, but never would have bought it had I not had it thrust into my hands by a friend from behind the gun counter. I actually thought the barrel was a gimmick, still do. But when He told me to try the trigger, I was sold, not only for that, but the feel and balance. I'm not a lay on the ground varmint shooter, but more of a walk around coyote shooter, and this rifle fits that role better than any I've found yet. They really didn't need to put the slots in the end of the barrel though, to an experienced rifleman, that wasn't necessary, but to the marketing people, I guess, that doesn't matter.
Bide your time cooling off my friend, we haven't gotten there yet, But if we don't wake up, we will be lucky if we even have 28 days. CRASH87