RE: 44 mag cast bullet load
That's kinda like asking how high is the sky. There are too many factors involved to give a meaningful answer. How hard are the bullets? What are you shooting it in? Revolver, single shot pistol, or rifle? What is the bore diameter?What diameter is the bullet? .429, .430, .431?
The only thing anyone can tell you for certain is in MOST cases, 1000 FPS is about the limit you can push a non gas check cast bullet without begining to get some leading. All those variables I asked about have a bearing on it. You might get leading at 800 FPS, you might be able to get 1200 without leading. Try a moderate load of Unique and go up from there. Most of the time Unique will top out at about 1000 FPS in a .44 magnum.