RJM, With your obvious experience, knowledge, and abilities, I hesitate to question anything you say about handguns; but your statement about there not being much 44 magnum brass used when loading for a Smith Mountain Gun (44 mag) brings out a question. Why would you not just download the magnum brass to the velocity you choose. I have always felt, maybe wrongfully so, that accuracy from a 44 mag cylinder would be better using the longer brass. No argument intended here; I'm just inquiring as to the reason.
Obviously I am not Bob, nor do I have his years of expertise.
I do exactly what you are talking about, and simply use .44 mag brass for everything. My standard load of 10 grains of Unique and a 240/250 grain cast SWC (medium load) could easily be duplicated in a Special case.
I find it very simple though to do 3 loads, essentially light, medium and heavy, all in magnum brass. This way there is a minimum of fuss, separating cases, adjusting dies, etc.
Easy Peasy.
THE CHAIR IS AGAINST THE WALL.
The Tikka T3 in .308 Winchester is the Glock 19 of the rifle world.