Any advice on 929 light primer strikes ?

[Melly1971]

Hi, I am using 9x21 cases in a 929, no light strikes or any problems with head space using cheap 0,35" thick moon clips. 9x21 can be used without moon clips too, because the cylinder is reamed for 9x21 and the case rests on the edge..

 

[Rocket3]

I had the same issue only a different revolver.
I emailed the folks at Starline Brass to get the specs on the head. My cases were all well within tolerance. They recommended using Remington primers. Have not had one FTF since. I was using CCI also.
Might give it a try.

 

[RogerTex]

S&W 929 light prime strikes

I purchased a 929 revolver and had problems with misfires and light primer strikes after only a couple of weeks. I send my gun back to S&W (their recommendation) twice for this problem. The first time they replaced the mainspring, the second time they replaced the firing pin. Within a couple weeks after receiving the revolver back, the light strikes (misfires) started occurring again. I finally identified the problem. I resolved it completely by replacing the S&W firing pin with a longer one (0.015 longer) from Brownells. The part number is 206-000-010. I have not had light primer strikes or misfires in the last year. I asked S&W tech support if they had a longer length firing pin. They indicated they did not offer one, and after the agent checked with the Engineering team, they indicated a longer firing was not in the current plan. This longer firing pin works perfect and I now have no complaints or problems.