Our J-Frames Got Stoned

tcon

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Last year I bought myself a M&P340 and my wife who is proficient with her Gen2 Glock 17 really liked shooting my new little Smith when I last took her shooting. So for Christmas, I got her a surprise S&W 642.

I wanted to break them in a bit before doing any tweaking on the triggers so we did a lot of dry firing and a couple of trips to the woods. I have no issue with the trigger pull on my black 340 but it certainly did need to have its insides smoothed. Slow-cycling, I could feel some rough spots especially right before the hammer released.

My wife loves her new 642 has no problem with the long-pull DAO or recoil with +P. The slow-cycling on her 642 was smoother than my 340, but I wanted the pull on her trigger to be a little lighter without risking failed ignition..

So last night, I opened, stripped, cleaned and stoned both revolvers and replaced the stock trigger rebound spring on my wife's with a 13lb Wolf. I did not change the hammer springs on either gun and I left the rebound spring on mine alone.

And then of course, the inevitable (for me) happened. A spring launched away. During reassembly of the hammer and sear on mine, the itty bitty sear spring popped out. I couldn't believe it. It is the gun's smallest spring. It was so small, I didn't hear it and had no idea where it went. I crawled around for 15 minutes with a magnet and flashlight with no luck.

I almost resigned myself to having to order a new one but as a last ditch effort, I hooked up the central vac, cut off the toe end of my wife's pantyhose, put the homemade filter pouch in between the handle and the floor nozzle. My shop needed vacuuming anyway. Happy ending is that I found that little thin spring after carefully sifting through the pile of dirt I picked up.

So I learned a new skill, both revolvers got their internal contact parts and edges polished and the results on both are excellent. During careful, deliberate slow-motion cycling, there are no rough points anywhere and at the end of the cycle, the hammers release like they are tuned single action. Feels smooth like glass on glass.

Some pictures below...

His and hers:
pair.jpg


The 642 before:
before.jpg


My 340 stripped:
strped.jpg


My 340 smoothed:
stond.jpg
 
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Nice polish job. Every Smith I own has needed the same treatment.

I have been there, done that, with respect to losing springs. I now take them apart in a plastic bag. While running a roller magnet across the shop floor I found a Ruger MKII sear spring I had lost years before.
 
Very nice. Your approach to improving performance while retaining reliability is great.

Froggie
 
NICE!!

BTW the return spring of the 340 wasn't factory or it too would have been blue.. Got a whole bag of them..

Congrats on the Stoning Job of the two J Frames
 
NICE!!

BTW the return spring of the 340 wasn't factory or it too would have been blue.. Got a whole bag of them..

Congrats on the Stoning Job of the two J Frames

Thanks, and good catch on the picture of the 340! I found a seller on eBay that had a package of three new Wolf rebound prings (13, 12, 11). On my wife's 640, I put the 13 in since reducing the trigger pull as much as safely possible was my goal on hers.

Then when I got to my 340, during reassembly I wanted to try the 12 for comparison. I had the 12 lb rebound spring in it when I took that picture, and after trying the trigger without the hammer spring contributing to the situation, I confirmed that I preferred the only slightly heavier return of the stock (blue) spring.

You have obviously done this before. If anyone is tempted to try this for the first time, I highly recommend Zaprudering the S&W Airweight Trigger Job: "The Yoda G Mod" video on YouTube. If you just watch it once, you may miss some important nuances Terry does like lightly "raking" the edges of the parts in addition to treating the obvious contact surfaces. He uses very light strokes with his two stones to polish the surfaces. There are also two places to not disturb also shown on the video.

I got my stones at knifemaking.com
WMHS2 Square Hard Arkansas File
WMHKB1 Tapered Hard Arkansas File
 
A few hundred rounds does a good enough "trigger job" for me.

My only revolver that had been stoned was done by someone that must've been stoned themselves.
 

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