The thread on dry firing prompted me to post on a recent experience with Azoom snap caps. I have used my 470 pair enough that the the plastic "primer" was too indented to cushion the firing pin. Turns out he hole is threaded 10-24. Easy enough to fix: Heat a screwdriver enough to plunge into the primer and when cool unscrew. Get some 10-24 nylon screws and screw in until they bottom, cut flush with a razor blade and voila, new snap caps

Great suggestion!