Jim, that's the exact load I use. I don't have a clue about the velocity, I don't have a chrono??? When I fire-formed, I used 25 grns., the fire-forming loads were quite accurate. I only had a 4X scope at the time, it shot 1/2 to 3/4 inch groups at 50 yards. I have put together everything I need to convert it to a carbine, with the exception of a barrel extension. I plan on letting my daughters use it on a hog or two, and hopefully deer. I have been unable to find an extension, I plan on having a friend build one for me. I'll let you all know how it works out.