Conallin24 wrote:I want it for mice and small birds within 15m in a 410 with a reduced load of 900fps
I doubt dust shot is going to kill them even at that range. It dumps velocity _very_ quickly due to lack of mass.
I shot a horsefly with .22 ratshot at about five feet with no effect. I doubt pushing the velocity up would make a difference either due to the lack of mass once the shot opens up. You'd probably do better to use 7.5-ish and dump some powder out to reduce velocity a bit. Or just use CCI Quiet 710fps .22LR.