I have 2 CVA's in 50 cal. Both seem to like Pyrodex better than 777. They also seem
to like lower charges versus higher. 70-90 grain range I'll see sub 6" groups @ 100 yards
open sights shooting 295 grain aerotip powerbelts. When I load 90-100+, they my grouping
goes wild. FYI - at 80 grains, 295 grain powerbelt, I'll see an 8" drop at 200 yards.