Triple 7

[DanE]

100 grains by volume of BH209 and two 50 grain 777 pellets shoot identical for me.

I've found no where near that
TC impact 80grns by weight 209 = 2 pellets 777
TC Pro Hunter longer barrel 26" 74grns by weight 209 = 2 pellets 777

normally most muzzleloaders preform sufficiently with pellets out to 100 yards, past that I've never seen great groupings at 200 yards with pellets but that's just my experience