I have a 442 which has lately been exhibiting occasional light strikes with a variety of factory ammo (mostly Fiocchi, Remington, and Precision Delta) that all seems to work fine in other revolvers. There is no discernible end-shake, and even after installing a 9 pound hammer spring (which Wolff considers “extra power” over the factory 8.5 spring) and Apex extended firing pin, I’m still getting some light strikes.
To illustrate the inconsistency of this weapon’s primer strikes, in the photo below, the primer on the left fired just fine, but the primer on the right did not:
Any ideas on causes, or how to fix this? I don’t mind going up a bit in hammer spring weight, but don’t know where to buy anything heavier than 9 pounds.
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