I never imagine how cat is hard to shoot. I shot one with 32g 4mm shots (1 1/8 oz, BB I think) at about 20yards, and second shot was neccesary to kill it (at about 5 yards distance : ) ). Also shot one at body from .22lr handgun, at about 50-70m, with solid bullet and cat run out, but with CCI stingers it is much better :-)
I am waiting to shoot more cats and foxes with Mosin M44, I make "own" ammunition, I bough cheap military FMJ ammo, and make hollow point on lathe to it . . .