You will have to just pick a bullet and try it. Different guns like different bullets. I have seen some that offered best accuracy with flat based lighter weight bullets and others that loved heavy for caliber boat tails. My Ruger M77 will shoot a 165 gameking spbt over 43.5 grains of IMR 4064 into an inch and is a fine load for game. Substituting in a 165 Hornady interlock opens the groups up to 3 inches or better. Gold Medal Match ammo, either 168 or 175, does a fuzz over an inch. My gun must just like the Sierra bullets.