Quote:
Originally Posted by murphydog
I would guess once the firing pin has hit the primer of a centerfire round that the empty's cushioning effect is lost. There is no problem with dry firing a centerfire gun in any case; if it is concerning to you, "snap-caps" are available. If you position an undented part of a .22 rimfire empty where the firing pin hits, it will prevent the firing pin from damaging the chamber or itself.
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My rimfires are always dry fired with spent cases. Like above, rotating them until the rims are mostly used up. I usually keep the last two cylinder-fulls of spent rounds at the range and give them a "cool off" period before I eject them. They won't expand anymore when cooled in the cylinder and will fit easily in the cylinder when I wish to dry fire.