S&W m19-3 misfires

[Strab]

Okay - round 2 (thanks for all the previous advice).

Took the old m19-3 to the range last night, and it shoots great; however, it may have a minor problem.

I out about 150 rounds through it. It had 3 misfires, all of which occured firing DA. I shot about 100 rounds SA, and 50 DA, and all three misfires happened when I was pulling DA.

Could this be a new spring that is needed?

Any other thoughts?

 

[BigG]

You may find if you remove the grips that the strain screw in the front strap has loosened and backed out. That is supposed to be tight. It puts pressure on the main spriing that drives the hammer. Hope this helps.

 

[lmccrock]

Also, it is possible the workings are dirty enough to impede the hammer fall so that a primer is dented, but not ignited. For me, and my M10, that meant removing the sideplate and cleaning out the gunk. Be careful, do not let the parts fall out, unless you know how to put the guts of a K-frame together.

Lee

 

[jtward01]

First, make sure the screw in the front of the pistol grip is tight. If you have the large target grips you may have to take them off first to see the screw. If you have the regular grips you'll be able to see it with them on.

Get a can of GunScrubber aerosol and using the little tube nozzle extension squirt it up though the spaces around the trigger and down into the frame through the spaces around the hammer. Soak it good, until it pours out the bottom. Wipe the gun down to remove all traces of the cleaner from the outside surfaces.

If these two steps don't cure the problem you probably need a new hammer spring.

If you do decide to remove the sideplate it's very easy to damage the edge of the sideplate. There is a trick to it to prevent the damage.

Remove the sideplate screws.

Hold the gun so the sideplate is face down.

Tap the frame of the gun with the rubber or plastic handle of your screwdriver until the sideplate drops into the palm of your hand.

There is also a remote chance the firing pin needs to be replaced. On a gun that has been very heavily used the firing pin can wear down enough to cause light primer strikes and misfires.

If you do decide to replace the hammer spring you might as well replace the trigger return spring, too. Wolffe Springs sells a two spring reduced power spring kit. Installing these two springs will significantly lighten the double action trigger pull.