utahpredator_7;
I use the CCI .22 Short CB loads, as well as a remaining stock of the Rem. and Winchester CB Short loads, too, for "in town duty".
They are about airgun quiet out of my old Winchester single-shot .22, and kill way out of proportion to their ballistics.
Last year, they accounted for 4 groundhogs, between 6 and 12 pounds, and between 35 and 52 yards. Headshots, except one top-of-shoulder-spine shot, and none moved anywhere.
50 yards is about max for the little CBs, and you HAVE to make a CNS shot, but a good .22 bolt-action that shoots them well makes that no problem, IMHO.
And, no, if you clean the chamber well, with something like a .243 brush, after ever 50 or so shorts, or before you want to use LRs again, there's not problem at all with using them in the LR chamber.
As for the legal question of shooting cats or "in town", well, you need to determine that for yourself in your own jurisdiction first.
Good luck.