Do literary research and you will find lots of powerbelt performance issues. Study Sectional Densities and ballistic coefficients. Understand jacketed versus plated. It is my opinion and mine only. Judge 4 your self.
I have judged for myself, and I don't base my opinion on "research," SDs, BCs, or third-hand stories about unrecovered animals. I base my opinion on dead animals I've shot. Nine or ten elk and three mule deer. None got away. Saddlesore's probably killed more.
Concerning yourself with the BC of a 400 grain 50 caliber hunk of lead is ridiculous.