Originally Posted by valkyriekl

Who makes the best? you do.

Shoot a bunch of .22 and save the once-fired brass. Put them in the chambers when you want to dry-fire. If you dryfire them a lot and feel the rims are too chewed up to provide any more benefit, discard them and put in some 'fresh' spent casings, and you're good to go again. You can even go so far as to mark the head stamps with permanent marker to make them look different from live rounds.

That's what I do. Ever since I've been using spent .22 brass as .22 snap caps, I haven't damaged a single firing pin or chamber mouth, revolver or auto.