For all practical purposes, the old 150-grain is about as good as it gets or is as much as is needed.
For just plinking and "getting all married up" with a rifle, any GI ammo will work just fine. Tight groups aren't all that important in that activity.
For serious hunting, I found that the Federal Premium High-Energy loads give as tight a group as my handloads with that bullet, and they're maybe 100 ft/sec faster. A tad expensive...