A little S&W J Frame Love

[Bugs]

I've had a S&W 640 PRO for a while now and have put about 400 rounds 38 special through it. It is rated for .357 but I see no need to abuse either myself or the gun. I have been using it as a carry gun with 38 +P. Revolver is very accurate and I can shoot it equally well with either hand. My only gripe was the heavy double action pull so I decided to fix that problem and installed an APEX trigger kit.
Gutted and ready for cleaning and trigger work.

[Bugs]

A little grimy inside and in need of a cleaning. Internals out and ready for prep.

[Bugs]

Insides cleaned up..

New firing pin and spring...

New hammer strut spring & rebound slide spring; reduced weight springs for lighter pull...

[Bugs]

Did a little smoothing of the rebound slide...now it rides like ball bearings on glass..

Rebound slide and reduced power spring back in with a little white lithium grease...

Smooth and prep the hammer strut...

A little lithium grease and new spring...

Reduced power mainspring installed on strut and ready for install...

[Bugs]

Hammer & mainspring reinstalled...

Side plate back on...

Shoes back on and she's ready to dance...

Took the trigger from a heavy 12.5 pound pull down to 8 pounds of smooth pull. Will be taking it out to the range tomorrow to see how it performs. The trigger is now really nice just want to ensure there are no light primer strikes and that the gun is reliable and will go bang.

[CT_Shooter]

Great photographic guide to the process. Thanks for sharing it.

[BrokenolMarine]

Very nice. I have the scandium M&P 340 357 and that featherweight beast is brutal to shoot with the magnums, but a dream to drop in a coat pocket. So light you forget it's there. I practice with plus p 38 ammo and shoot a few 357s now and then, just to prove I can. (Then my hand and wrist file an OSHA complaint... )

I might look into that apex trigger kit.

[North Country Gal]

Yes, very nice presentation. If I still shot J Frames, I would bookmark this one. Please lets know how the gun performs with the new kit.

[Bugs]

Very nice. I have the scandium M&P 340 357 and that featherweight beast is brutal to shoot with the magnums, but a dream to drop in a coat pocket. So light you forget it's there. I practice with plus p 38 ammo and shoot a few 357s now and then, just to prove I can. (Then my hand and wrist file an OSHA complaint... )

I might look into that apex trigger kit.

The 640 PRO is too heavy to just drop in a pocket; it requires a holster. But it carries so well in a good holster. I had LOBO Gun Leather make me one before he retired. Could never see the use of magnum ammo in a short barrel J-Frame, not sure if there is enough velocity produced to justify the resulting punishment . +P I believe is more than adequate in these little guns. The APEX trigger kit is easy to install as long as you feel comfortable opening up and tinkering with a revolver. J-Frames are pretty easy to work on.

[Bugs]

Yes, very nice presentation. If I still shot J Frames, I would bookmark this one. Please lets know how the gun performs with the new kit.

I plan on shooting it tomorrow afternoon. I'll let you know.