I still need to dig out the notes for the load I did find to be subsonic, just real busy lately. The load that I worked up was grouping about an inch at 50 yds, going 1050 fps. with a pretty good boom. Certainly not full power boom, but you needed hearing protection. However when I ran that load through the can it gained speed and was running about 1200 fps. so I need to slow it down. Still made more noise than I want through the can.