I just got my Disc Elite also and built it up this weekend. I have always used the 250 barnes mz. Well this time I used Hornady SST 250 with a MMP Sub Base. 120 triple Seven 2F. The gun shot some of the best groups I ever had with a muzzleloader 1" groups at 100 yards. I never got a flyer one. I think the sub-Base made a huge difference. If anyone has used a sst 250 with a normal non-smokeless powder gun please that has killed game please let me know how they performed on game.