For what I've seen/done, newer guns do better with DFs. I don't DF shotguns or Rimfires unless it says its ok in the manual. However, I have accidentally DF-d an A5 before without harm.
I've always been taught not to dry fire rimfires but don't know why...
Can anyone shed insight or is it something you've always been told without explanation like me?
"I've always been taught not to dry fire rimfires but don't know why..."
Rimfires by design crimp the rim of the cartridge between the chamber edge and the firing pin. If you have too much fore and aft movement of the FP or if you have tight headspace, the firing pin will hit the chamber edge and cause a burr. This will cause extraction problems until it is ironed out.
I'll have to remember that for my Marlin 60SB, Marlin 922M, Ruger Single Six, Beretta 21A, and any other rimfires I've forgotten to mention. They have all been dry-fired extensively, but I guess I'm taking my chances.
"I'll have to remember that for my Marlin 60SB, Marlin 922M, Ruger Single Six, Beretta 21A, and any other rimfires I've forgotten to mention. They have all been dry-fired extensively, but I guess I'm taking my chances. "
The firearms you mention aren't known for tight headspace so you're probably not taking too much of a chance.
I have never seen a Ruger peen a chamber. The .22's I have seen that will are Winchester 52's, T/C Classic's, Dakota Arms, Annie's, and early Kimber 82's. The production guns normally have enough room so that it is not a problem.
All bets are off if you put an aftermarket firing pin in though.