... problem seems fairly "common" won't decock, decock if top and bottom squeezed together. Right decocker will, left decocker won't. It's at my smith's shop, I'll make sure to show him this article also...
Thanks
Those comments make it seem rather as if the sear release lever has become too worn and needs to be replaced - or - someone has replaced the manual safety assembly in that gun (for whatever reason) and the sear release lever is no longer within proper spec for the "new" safety assembly.
From my experience and what I've encountered, the reason the
right side lever will still decock, but not the
left side lever, is because the sear release lever is on the
right side of the frame, under the right end of the manual safety body, and the right lever has more mechanical advantage to fully depress the lever that's become worn down. (There's a little bit of normal clearance between the manual safety body and the slide, and pushing down on the right side lever (and therefore the right end of the safety body's cylinder) might be just enough to still let the safety body push down against a worn sear release lever.)
The reason "squeezing" the slide down onto the frame will work is also often indicative of a worn sear release lever, including one whose top surface has become worn over time. Pushing the slide down in effect lowers the manual safety body closer to the frame, against the top of the sear release lever. It might help compensate for a lever whose top has become worn down. (The top of the lever is
not an adjustment spot, nor ought it to be filed. Only the bottom of the lever's "foot" is filed to fit the needs of the particular gun.)