The bullets are the same. It is the sabot that will make the difference in loading. For instance, the Hornady SST and the Hornady sabot are near impossible to load in my Thompson Center Black Diamond XR. The Thompson Center Shockwave with the Thompson Center sabot is firm but very able to load with excellent accuracy. Although is did run into one box of Thompson Center Shockwaves a while back that I purchased, where I had to change the sabot out. Your rifle will tell you which one you want to shoot.