CCI Minimags(round nose, 40 gr.), hands down for me. The 36 gr. hollowpoints have worked well for me too with the exception of only 2-3 failures to fire(which later did fire). Winchester super-x runs well. Currently finishing off a bulk box of Winchester Xpert HV, no problems yet. Only one I've had trouble with was when I first bought my rifle. CCI Blazers were not going off in each magazine I fed it for a while which was really discouraging but I have another box and will see if my luck is better