Recently I picked up a Martini Cadet rechambered in .25-20 WCF. I want to make this rifle a small game and varmit rifle. Something I could use on mainly squirrels but also whistlepigs and raccoons without blowing them to pieces. I know a standard .22LR is a 40gr or 45gr bullet. I am trying to find something close to this grain weight for .25 caliber more importantly .258" diameter which is the bore of my rifle after slugging it. Anyone got any ideas ? Also I was thinking about using some trailboss powder about 8 grains of H110 and a 55gr or 60gr bullet.