I don't have a clue about comp ammo but I did load some personal defense rounds for a buddy this weekend. We used 158gr Honady XTP with max charges of Unique and 2400. The 2400 seemed to be a little more accurate. They where being fired from a Smith airwieght. As you can imagine the recoil was pretty heavy for 38. I imagine it would prove to be good medicine for two-legged varmints but not great for paper punching.