Mack, I have the precursur to the BD (System 1) and it won't shoot TC Maxi-Balls, Maxi-Hunters or Remington Maxi's at all. Sprays them all over the paper whether it be 25 or 50 yds and won't hit the paper at 100yds. Hornady 240 gr (green) and 300 gr sabots (black) are a different story altogether-wicked accurate. I was ready to give up on it till I tried the sabots, so I suggest try many and see if works; if no, keep trying till you find something that does. The Maxis were wicked easy to load while the sabots are more difficult, and I believe the bore may be a bit larger and thus my results. I may be incorrect here but whatever...good luck.