Rowdy, the closest I can come to help here is that I've shot Triple 7 in cap and ball'ers. Does rather well while you are 'getting with it'. I found after it cooled to be harder and more gritty. Softens right up with warm water for cleaning and seems less dirty to clean,,but the harder , more gritty effect it 'may' have in a rife concerns me. But, I've just shot Triple 7 plinking around out back and not a controlled ,,or even noted,,experiment. So,,I fear I'm not much help.
I DO use Triple 7 in my inline muzzle-loader...but that's rarely multiple shots and it's a totally different beast. So,,,,,,,,,,,,,,,,
Marshal Deadwood