RE: Shot in my 22 pistol
If you use the "shot capsule" type, you're fine, the shot will be carried down the bbl inside the capsule and won't damage your bore, but the crimped kind don't have this protection...I'll never shoot that kind in any of my guns...Although, there's a strong arguement that the lead shot won't hurt your steel barrel anyway, but I'm not going to take any chances, throw an egg against a window hard enough and both break, know what I mean?
One thing that I found problematic: for some reason, in most semi-auto's I've used them in, CCI shotshells -nickel plated brass with blue shot capsules-haven't cycled the action fully, in my Ruger Mark II pistols, I get nothing but jams, in my Marlin rifles, they don't even open enough to jam, they just slam back home on an empty-if they open at all