Go to these places. They are filled with guys who have been in your shoes. Some still are, some come close to walking on water when it comes to BPCR;

http://historicshooting.com/mybb/index.php

https://shilohrifle.com/forums/

http://castboolits.gunloads.com/forumdisplay.php?30-Black-Powder-Cartridge

Ed

"Not in an open forum, where truth has less value than opinions, where all opinions are equally welcome regardless of their origins, rationale, inanity, or truth, where opinions are neither of equal value nor decisive." Ken Howell