Taurus Raging Bull, 454, 300gr FA JHP @ 1,716 fps w/ 30gr of H110--Pressure 53,700 CUP.
BFR 45-70 300gr Sierra HP @ 1,690 fps w/ 62g of H4895--Pressure 21,000 CUP.
The loads and pressures listed are direct from the Hodgdon website. The speed of the 45-70 is from a chronographed load. The fps data Hodgdon lists for the 45-70 is from a rifle, just don't seem to find load data for 45-70 under pistol--kinda crazy.
Personal experience is the BFR is tame compared to a full house from my Taurus and the BFR is just barely into its potential. A 405gr at 1225 fps is joy to hunt with. It'll go 1,500 fps with the 405gr for about 2,000 ft lbs of energy, if I want it to.