Rimfire S&W Trigger Work

[AxeHandle]

Nightmares to tell about slicking up my S&W 617 DAO and the resulting light hammer strikes. Started with a 617 that belonged to a friend. Bad experience there. Flash forward a couple of years. Hoping the problem experienced with the friend's gun was that specific gun and now I'm playing with my own. Turns out it is the platform, NOT a specific gun. Make note of the "Do Not Dry Fire" message that comes with the expended firing pin. It DID not aid in ignition and dinged the chamber when the gun was dry fired. Playing evolved to trigger return springs only and the TK Custom Mass Driver hammer.

[Chuck Perry]

I too had the install this same hammer before I had anything near reliability. Even now it still has issues, but those are ammo specific. Mine HATES Federal Auto Match. After about 100 rounds of that stuff I start getting light strikes in increasing frequency till I thoroughly clean the gun. However other ammo, such as Federal Champion, runs great for as many rounds as I care to shoot between cleanings.