My Walkers and Dragoons....
don't seem to like more than about 40 grains.
They are all ASM manufactured revolvers in cood condition. I shoot only 777.
What I find is that accuracy suffers above 40 grains. I think I remember shooting about 1050 fps at fifty grains and about 950 at forty grains. I don't know what is it about the system that makes it less stable with the higher volume of powder. I suspect it might be things that are going on just outside the muzzle when the round is in its first three to five inches of travel outside the barrel.
Not smart enough to know for sure.
My reading of history convinces me that most bad government results from too much government. Thomas Jefferson