I didn't like 777, but I can't tell you why its been too many years. So I've been using Pioneer Gold, 100 grs and a 280gr 45 cal minnie ball in a sabot. I hunted ID last year and its no jacketed bullets or sabots. Its really hard to find 50cal lead bullets. The BD has a problem if it isn't cleaned after a couple of shots, it start shoot low left. The first time I chased the bullet, when it happened the second time I figured it out. TC said to send it in, but how often do you shoot more the a couple of times in the field. It has a tight ball, it OK with sabots but I had to hammer the lead maxi hunter home to get it loaded.