Great. I own an 8 round S&W 317. That's a .22. It's not ok to fire on an empty cylinder, firing pin damage. I can't even put in an empty case, that could be misconstrued as being live when I put it in. The plastic snap caps last something like 10 hits. This is gonna be fun.
I'm told that cheap plastic drywall anchors make great .22 snap caps, although I've never tried it, and I don't remember which size I was told to use.