do you handload? if not you might try the hornady leverevolution ammo I hear the stuff is first rate factory ammo. my personal preference before I started handloading was 170 grain remington core lokts my marlin 30AW shoots them very well. now that I began handloading I use 170 grain sierra pro hunters they also shoot very well from my 30-30 my gun just seems to prefer 170 bullets i think. but if you do handload and the rifle being a bolt action you would beable to load pointed spitzer style bullets which would deffinately enhance the performance of the cartridge.