My .50Encore shoots really well with JSG and Hornady SST sabots(same bullet as Shockwave).
I've never shot either SSTs/Shockwaves or JSG. Then, this morning I'm browsing through the ML stuff at the local Acadamy Sports store and they had the 20 bullet packsof Hornady45-300 grainSSTs with sabotson sale for $2.88 a box. Bought all 6 boxes they had. Even if they don't shoot well for me, at that price they'll make good plinkers. They also had JSGFFG$16 a canister. Bought a pound of that to try also.
I now have so many bullet and powder combinations to play with that I'll be an old, old man before I've tried them all.