RE: Black powder vs Triple 7
There are too many variables to even give you a proper answer. Even a self-drying blackpowder can turn to wet mush under your nipplein bad weather on any given day between October & January. If you have been doing this repeately between October & January with 100% success, you are either a very lucky man (or) a man that does not hunt or store his rifle in humid, wet weather -- nor exhibit your rifle to rapidly changing temperatures.
BTW... I shoot my load at the end of each day. I don't care if the land is private or public. I always start with a fresh loadthe next morning.