Well so far I have found out that the 50 - 95 caliber is great on the thin skin animals and had 1700-lbs of energy with a 300 grn bullet going 1500 fps at 100 yards. However, many so called experts believe the 45/75 was much better in penetration. This is very important I think when dealilng wilth dangerous critters like grizzly bears. It too was shooting a 300 grn bullet.
I don't have the velocity or kinetic energy of the 45 - 75 caliber loaded up with a 300 grn bullet as of yet!