.452 300 gr. XTP/Harvester crushrib sabot/ 2 pyrodex pellets, very accurate in my .50 Encore and deadly too! I'm done with pyrodex, just too corrosive, got some T7 pellets for Christmas and will try them, shouldn't be much if any difference in POI. I want to try the loose T7 FFg too.
Winchester T7 209's also. The Remington 209's will work, but blowback is still there in the breech.