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Misfire Fixes
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June 12, 2014
6:27 am
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rwsem
SOWELA (Southwest Louisiana)

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Technically, the glass is always full; half liquid, half air....

October 18, 2014
9:16 am
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mrarff
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Ron, I had the part the grip screw fits into back out a couple of threads, causing misfires/light strikes. When I removed the grip screw to diagnose the problem the “spring seat” or what ever it’s officially called, completely backed out. It came off in the grip. My question is when I screwed it back in, I really didn’t know how many threads to leave “showing” on the outside. I know that too few and the hammer won’t lock back in SA, too many will result in light strikes.so how many threads showing, two ,three, I am at a loss.

Thanks in advance for any info.

October 18, 2014
9:56 am
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rwsem
SOWELA (Southwest Louisiana)

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The mainspring seat screws in to about one thread showing.   If it’s that loose, try some med strength loctite and let it cure before reassembling.  Or you can peen it in place- there should be a few guides on the bottom of the frame.  

The main spring seat doesn’t have any bearing on how far you screw in the grip screw.  It’s just a reducer of sorts.

The issue that occurs is when the grip screw is screwed in and raises the mainspring guide too high and causes interference by placing too much pressure (sometimes not enough) on the the hammer assembly.  

Hope that helps, Ron

Technically, the glass is always full; half liquid, half air....

October 19, 2014
7:55 pm
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mrarff
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Thanks Ron!, it seems to be fine with that fix. I used one drop of medium strength (removable) Loctite as you suggested. Perfect!

February 28, 2018
5:33 am
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Wastoute
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Thank you so much for this help.  I have a 15-B a picked up for a song 40 years ago but the double action always misfired one or two rounds per 6 so I never really shot it or did anything with it.  After seeing this info I decided to try to fix it.  After a couple weeks of fiddling around I was able to do so!  I started out with the “easy stuff”, the screw on the ball at the back of the cylinder was backed out past flush so I tightened that up a little below flush.  That did seem to center up the light strikes and then I was able to fire 6 shots on DA but then the next 6 would have one or two misfires/light strikes.  I ordered the cylinder shims and a new mainspring but before putting them in I put the washer under the grip screw.  The grip screw took 7 turns so even though I didn’t really understand just how this might fix things it did work.  With the washer the grip screw takes 5 turns.  On the 15-B the threaded part the grip screws into is welded down so there is no adjustment there.  But sure enough, with the washer it only takes 5 turns to “snug” and yesterday I shot three times 6 without a single misfire.  I will keep working with it to be sure but I am about to consider this for EDC.

Thanks again!  Invaluable info on this forum and I feel like I have taken a short course in revolver gunsmithing now.

February 28, 2018
8:37 am
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SCORPIO
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For double action issues ALWAYS start with the grip screw first, it is the biggest culprit in these cases.   Glad you got yours working.

Anything worth doing is worth doing well.

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If a man designed it, and a man built it, then a man can fix it.

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