what ever ammo your gun likes best and shoots most accurately.My CZ likes cci mini mag hollow points.I would reccomend a high velocity hollow point for coons they can be tough critters.If you use hollow points for squirrels and rabbits try to limit yourself to head shots so you dont destroy the meat.you can try some of the bulk ammo several makers offer 500 or 550 round boxes for about $15 and some guns shoot them well the remington bulk stuff shoots almost as good in my CZ as the CCI's but my marlin and ruger 10-22 and my single six like the federal,my ruger markII loves sub sonics,22 ammo is cheap and you should not limt yourself to just one kind or brand,you can pick up a box for a few bucks and try it and see if your gun shoots it well.GOOD LUCK!!