'92 clones are the strongest, Marlins pretty close, not sure about the Henry.

In my .45 Colt Marlin 94 Cowboy, I shoot 300 gr. JHP and cast bullets ahead of a full charge of H4227. That powder has a smooth pressure curve and great performance in the .45 Colt. For that reason, one may want to check out H4227 loads in whatever rifle or pistol in that caliber.

DF