I'm running into an intermittent problem with light primer strikes in my model 10 K frame revolver. The strain screw is full in and the hammer feels like it has good tension. Every once in a while I'll hit 2 or 3 light strikes in a row shooting double action. The primers will have very tiny dents, nothing like the shots that preceded them or followed. This mostly happens when shooting double action. I am using CCI #500 primers in my reloads.

Any suggestions on what to check? The gun shoots phenominally, and I've had it for 20 plus years now. I only remember this happening 10 plus years ago when I turned down the strain screw, but that isn't the case here. 90% of the reloads fire normally, with deep primer indents. The one's that don't fire, have very minimal dents, and upon recocking and firing single action, still didn't ignite. I fired 6 rounds of someone elses ammo and they all fired, then I tried the 3 "duds" again, and 2/3 went off. So its like an intermittent problem in my mind.

I would take the side plate off and give it a good cleaning.
You might have some dried oil or grease that is slowing down
the hammer. Be sure the main spring is not a reduced power
spring. If you want to reduce the trigger pull use a reduced
power rebound spring. Also make sure your primers are seated
all the way down. High primers will also give you light strikes.
Don

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I had the same problem with my old model 10. I took the hammer out of the gun cleaned everything, removing old unburnt powder residue. I also changed the main spring, as I thought it may have weakened over time. I still had several light primer strikes on my reloads during my next shooting session. Since then, I started using only Winchester primers and have not had a problem since. I use my model 10 in IDPA and have fired approximately 1100 rounds of reloads with the Winchester primers in the past few months with no light strikes happening again. I found both CCI and Wolf primers gave my model 10 the light strike problems.

I've been trying to sort out the same problem with a Model 12, here's a link to mt thread in the 'smithing section. There's some good info there...


Light strikes - K Frame *UPDATED*

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Thanks all. Black Sheep, I'd seen your posts on this before, but for some reason I was unable to find them when I went looking. Must have gone to the wrong forum. I'm going to follow all the suggestions.