I had a bunch of 125 gr PSP I use in a contender, the same load works as well in the Handi, but mine has a short throat and the bullets had a sharp taper. I load them to 2.495 to miss the lands. I load .310 dia 123 gr to 2.575, and the 147 gr FMJ_BT to 2.720. The 125's are plenty accurate, I load them for my grandson (11) with 37.5 gr of WW748. I think I am getting about 2450-2500 fps, fairly mild.