Yes it is the GT bullet. We had a lengthy phone conversation before I ordered anything and felt that these would probably work. Yep, we will have to see how the shorty likes em. My barrel seems to produce faster velocities than expected. The only leading I ever experienced with it, was from some cowboy bullets. And,,That may have been, from me running them a little fast. If I can find an accurate load then I am going to try them on a whitetail for sure.