I have a MK 1 standard model that was misfiring constantly

by uncowboy, Wednesday, February 01, 2012, 16:16 (4627 days ago) @ Slow Hand

Mk 1 Most likely problems ! with your description I would say ,
Dirt ??? Is it Really clean and there is no fouling keeping the bolt from closeing all the way. NOT SAYING you don't know how to clean your gun but This is the #1 problem when they are brought to me.
#2 This is most likely your problem because you know how to clean your gun right! The fireing pin BLUNTS out. Gets too wide to crack the rim. Take out your fireing pin streach it a bit by peaning the middle agenst a hard plate of steel. Measure before and after try to get 10 thousands longer Then with a file re profile the fireing pin to thin the profile, Just break the edges that are there. This will help a lot.
NEVER saw a mainspring on a MK 1 weaken to the point of light hits. Other guns yes but not the Rugers. Good luck. J.Michael


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