We're sidetracked a little here, I think.
I'll jump in for Amy here. Due to nerve damage in my support arm, rifles without a rest are no good for me. SO.....I learned how to shoot a magnum pistol at longer distances. I don't doubt her for one second.
I CAN, and DO hit clay pigeons hung on a board at 100 yards quite often with my 9.5" 44 super redhawk, in front of witnesses, if you want names and phone numbers send me a pm. Long range pistol work can be done folks!!!!
(Sorry I just get a little torqued when people say a pistol is worthless beyond 50 or 75 yards.)
The load I use is a laser-cast 245gr SWC in front of 22.5 grains of 2400, in winchester brass, lit by a federal magnum primer. This load does 1550 @ the muzzle in my SRH. This load is at or above current published maximums-use at your own risk!!
As for the load that is the subject of the original question: Make sure you have high bullet pull & a good crimp both.
Endnote: Let's all remember this is the high road folks, we're all on the same side.