The new Hornady 50 Caliber, 300 grain, SST/ML Low Drag Sabot's shoot superb in my Remington Genesis. 100 grains of Tripple Seven loose, Tripple Seven 209 primer shoot best in my gun. After three fouling shots that group into 2" at 100 yards then I fire three more and group under an inch at 100 yards.
Can't wait to get my can of Blackhorn 209 and try it.