Hodgdon.com has reload data for the .44 russian. If you can get it, use a light (200 gr) soft cast bullet and drive it about 700-750 fps. These 19th century guns had much softer steel in the barrels, Try to stay away from hard cast bullets and jacketed bullets. Ben Hunchak can probably make up some suitable soft cast bullets for you. I have a lyman .44 cast bullet mould that throws 215 gr .430 bullets, which i bought for the .44 russian.