CraigC
Sixgun Nut
It doesn't matter. You can't get enough H110 in the .454 case to exceed its pressure ceiling.
I really enjoy the .454Casull but I doubt that I will ever know the top end that it is capable of. 37.5 grains of H110 with a 240 grain Hornady XTP is about as hot as I ever care to take one which is well under what the cartridge is rated at but also seems to be where sticky extraction starts rearing it’s head a bit.