Well if you want to shoot pellets.. try the Pyrodex RS. And pick up some 250 grain shockwaves and 250 grain Hornady XTPs and try them with 100 grains of pellets.

If you want.. get loose Pyrodex RS and try 90 grains and those same two bullets suggested. For 50 yard shooting the XTP is all the hunting bullet I would think you need for deer.