A short stubby bullet works best. I like a blunt nose 30-30 bullet. It aint like the bullet is going to go very far anyway. It's going to have a trajectory like a limp talley wacker anyway. I sight my 308 in with my regular load of 44 grains of H-4895. I have to click scope up 7.5 inches to get the sub sonic load on target at 50 yds.