Originally Posted by bluesman69
I was told to never dry fire a .22. Has that changed?
Yes & no. For the vast majority of .22s that is true.
However, if anyone has figured out how to disassemble a Ruger MK3 (see manual, disassembly, step 1.) without dry firing, I'd be happy to hear about it. But then, the design of the bolt/firing pin assembly takes this into account. Even then, this is only for disassembly/ reassembly. Extensive dry fire practice is another matter entirely. The design doesn't look so robust to where I'd try it.
If your (rimfire) gun's owners manual doesn't say specifically that you can dry fire, don't.