I have that 265 grain MP mold...simply excellent. 21.0 grains of H110 moves it right along...
It is a little too much in the way of recoil for S&Ws and Blackhawks but in an all steel Ruger Bisley, Hunter or Freedom Arms 83 it is a stomper...
Bob
I just checked Hodgdon loads website. Their maximum of H1100/W296 for 265 grains bullet is 20.8 grains and velocity is 1540 fps, although from 10.125" barrel. If fired from 7.5" barrel revolver, I guess velocity should be at least 1300-1350 fps (hope more knowledgeable forum members will correct me if I am wrong). Yeah, that is a stomper by any yardstick, I would say on both ends, when fired from S&W or Blackhawk.
What caught my attention is a starting load; 19.5 grains, velocity 1410 fps, corrected to 7.5" revolver around 1200 fps. If 45-454424, with muzzle velocity 1100 fps is one shot proposal, that goes right through full grown cow, 41-265, with same, or almost same meplat, at 1200 fps, with 19% more energy, should be even better.
But, look at the pressure for 19.5 grains, it is 24 400 CUP only. This is considerably easier on ears, when fired in a hurry, than 20.8 grains making 37 600 CUP.
My point is that 19.5 grains load should be noticeably easier on hands than full power load, and even from S&W or Blackhawk, shouldn't be too bad. One note: revolver recoil is not just from bullet leaving barrel, but also from powder and reaction created by jet effect of gases. So, everything combined, I wouldn't be surprised if recoil is about 25% less.
I still remember when years ago I was testing 45-325 SWC with 2 grease grooves. Velocity was about 1050-1100, according to load data. For me, from Bisley, that was just a bit stiff load, but perfectly manageable. For another shooter, about 20 older, that was more than he liked. I am sure that these days, shooting same load, I will have same opinion as he did.