Am getting a supressed 44 mag looking for a load around 1000 fps with 240-300gr bullets. Have never handloaded for pistol but have been rifle loading over 15 yrs. Any help would be appreciated.

11 grains of Accurate #5 and a standard primer behind any 240-250-grain SWC. Accurate, roughly 1000 fps, very comfortable to shoot, but stiff enough to humanely dispatch anything from a feral pig to a mule deer, at handgun distances. The late Finn Aagaard recommended it years ago when Accurate first came out. I tried it and it became my standard Keith "plinking" 44 Mag load. I use the Lyman 429421 and cast my own...
Try it, and good shooting!

Try some universal clays for your reduced loads. It burns fairly clean, and works very well for my low speed loads. I can't recall exact charge weights, but check out the companys web sight and you will find good information there.

8.5 gr of Unique with a 240 gr. cast bullet will do just what you want. Out of most hanguns. This is my all the time most used 44 mag load.