Doubling on Md. 41

[SShearer]

Some history on the gun, bought new, had trigger job done about 20 years ago, set @ 2 lbs. Worked great for all these years. The other day it doubled twice after shooting about 60 rds. I cleaned it, paying special attention to hammer sear area, breech face and chamber. When back, out after about 40 or so rds. it doubled again. This was with federal lightning. I swiched to winchester X-pert and shot around 100 rds. with no problems. Today I took the hammer and sear out, they looked fine under magnafication. Hammer still falls a little over 2 lbs. During reasembly I could feel the hammer bump the halfcock notch when lowering it with my thumb, so I backed out the trigger stop to allow the sear to disingage more. Am I on the right track or could this be some kind of slamfire issue? I've used both the above ammo for years with no problems. I'm running out of ideas. Thanks,
Steve

 

[SShearer]

Some history on the gun, bought new, had trigger job done about 20 years ago, set @ 2 lbs. Worked great for all these years. The other day it doubled twice after shooting about 60 rds. I cleaned it, paying special attention to hammer sear area, breech face and chamber. When back, out after about 40 or so rds. it doubled again. This was with federal lightning. I swiched to winchester X-pert and shot around 100 rds. with no problems. Today I took the hammer and sear out, they looked fine under magnafication. Hammer still falls a little over 2 lbs. During reasembly I could feel the hammer bump the halfcock notch when lowering it with my thumb, so I backed out the trigger stop to allow the sear to disingage more. Am I on the right track or could this be some kind of slamfire issue? I've used both the above ammo for years with no problems. I'm running out of ideas. Thanks,
Steve

 

[john traveler]

Check the tension of the sear spring. Remove and clean off firing residue, dried oil, etc. If it is too light, the sear engagement can be jarred off when the slide slams shut.

 

[SShearer]

Thanks for the reply John, those sound like good things to check. Is there a procedure for checking the tension of the sear spring?
Steve

 

[ChuckS1]

Go ask your question over here. Not to take anything away from this forum, there are a number of Model 41 experts there who can help you out. It also has what is arguably the best Model 41 technical info (with pictures) of any gun web site.

 

[SShearer]

Thanks for the heads up on that site Chuck I'll try over there too.
Steve

 

[jaybar]

Its possible that the cam lobe on the sear bar/disconnector may be worn such that the disconnector isn't disconnecting. Remove the grips and ,with a magazine in the gun, cycle the slide and observe the interaction of the sear bar and sear tab while holding the trigger to rear. Make sure that the sear bar is actually disconnecting.