I hunt with a Savage American Classic in 7mm Rem Mag. It has the same rate of twist you're inquiring about. I've been using 150gr Winchester Super X ammo for elk and they shoot great. However, the best accuracy I've gotten out of my gun has been 139gr Hornady Interbond bullets. My gun loves it! I've shot many 3 shot groups that were touching. I've had that gun for about 5 years now and have shot 1 elk and 3 deer using those same bullets. None of them took a step.
Good luck!