Factory 145gr. Silvertips exit my 4" GP 100 at around 1350fps. Since you're a muzzle energy guy, that's nearly 600fpe. Hardly watered down. If this load didn't put that BG down, I find it hard to believe any other load would have given the same shot placement.
P.A. Glocker Charter Member #48
Pennsylvania Constitution Article I, Section 21
The right of the citizens to bear arms in defense of
themselves and the State shall not be questioned.