I use a Savage Axis and a Handi, both in .223, as if they were .22 Mags, except loaded with my cast 55gr bullets instead of the usual 40-50gr of the .22 Mag. I tried down-loading both to .22LR levels, and the Axis did better than the Handi due to it having 1:9" twist instead of my Handi's 1:12" twist (the newer ones had 1:9), but still not great. They both seemed to like the bullets going at least 1600fps per my chrono, and 1900 was better. But when I tried to drop velocities to around 1100-1200fps, both groups went south quick on me. The Axis consistently did 2"@50yds down to 1300fps, but the Handi went from 2.5"@50yds at 1500fps to 6"@50 at 1400fps. Now to be fair though, and I'm sure this had some effect, the Handi has a 4x32mm scope and the Axis has a 3-9x40mm. I'm considering dedicating the Handi as a cast bullet shooter at around 1800fps since it does 1.5"@50yds and 3.5"@100yds there, and going back to using the Axis as a jacketed bullet shooter at full power, but haven't decided yet.