Good choice, KWK. I tried Hodgdon's T7 (777) in my 14 bore and received some weird pressure excursions/jumps for my trouble. This rifle has never lifted the hammer off the cap when firing, even with 225gr. 2F loads, yet a 130gr. charge of T-7 did just that in 2 of the 5 shots fired with it. I then went back to noromal BP hunting charge of 165gr. 2F with normal fired full, slightly expanded cap left on the nipple with no fragments when fired. This showed the nipple's flash hole was not injured by the 2- excursions. I'll not use T7 again. It's accuracy was a bust as well - terrible compared to real BP.