All guns are different but the best load for my Encore is a Winchester 209 primer, (2) 50 grain pellets and (1) 30 grain pellet of Pyrodex under a T/C 200 grain Shockwave. Off the bench I get cloverleafs at 100 yards. With the 250 grain Shockwaves, I get about a 2-1/2" group.

I have never messed with loose powder so I have no recommendations with that. The guys on this forum will definately get you going in the right direction.