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Discussion Starter #1
Recently picked up a used 44. It shoots great and has an extremely light single action trigger on it. The problem is that it won't hit the primer hard enough to shoot double action. I replaced the mainspring with a standard weight spring and there is no change. Light dents in the primer but no BANG. Any advice would be appreciated, Thanx
 

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If you reload try Winchester primers. If not check your firing pin for damage or buildup. Clean area with brake free cleaner and lightly lube with a good gun oil. I had same problem on a 357 years ago when I went to a lighter spring kit. Mine resolved with the Winchester primers. Was the mainspring new that you replaced with? Usually a light strike is weak mainspring or buildup around firing pin.
 

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Discussion Starter #3
The mainspring replacement is new.
The gun is clean, it came out of the blueing tank 2 weeks ago.
I do reload, and will try Fed and Win primers. I have a 4" barrel for this gun as it will be carried in bear country. I am looking for 100% reliable in double action mode.
 

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I'd measure the firing pin with a good set of calipers and micrometers (length and circumference respectively) and measure the through hole to be sure there is enough free play for it to pass and call DW and ask what the nominal length is for the firing pin. I've seen some pins wear in such a manner that they look fine but will have the exact problem you describe.
 
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