I've killed a bunch of Coyotes with a 17HMR but I think the 22 mag does a little better and has more ammo selection obviously. They both work for 100 yard shots which you can't expect a kid to be shooting further than that sounds like he weighs 40 lbs so he's a little kid.

Moving up from there you are talking about .22 Hornet or 204 Ruger... something like that.

40lb little fella.... 17 or 22 Mag. Done.


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