Comparing apples to pineapples but.
I have been trying to load the Ranch Dog 432 265 in my 44 magnum for shooting bowling pins. The best I can do from a rest at fifty feet is about 4.5 inch.
This with six to seven grains of Unique. [44 special loads in mag. brass.]
With a 240 grain SWC with the same powder it shoots an inch and a half.
This tells me something. What exactly, I don't know. I will go with what shoots best for me.
Those heavy boolits seem to be made for serious power in the magnums.
They work great in all my magnums at full bore velocities.
I would try some 200 grain 44 40 boolits in the single action.
Life is good