I'm pretty sure I tried shockwaves. There were some sabots that came with the rifle but they didn't seemto group anybetter. I need to try it again when there is no wind at all. The sabots are definatly harder to load than the powerbelts but they are gatting easier. I really want to find a load thats accurate out around 150-200 yards. Thats the only reason I bought a muzzleloader. I live in a shotgun only area and I have a few spots that deer appear at 200 yards in any direction. I haven't found a slug yet that I dare shoot at 200 yards.