Pinnacle 9mm conv+ S&W 637/642

[Gary A]

Seems like it would require considerable ammo savings of 9mm over .38 or .357 to offset the cost of the conversion. Might take a while in a pocket or backup gun.

Also, the Smith 940s often had problems with cases sticking, and they recommended either using non +P rounds or nickeled cases if someone had that problem. With sticky ammo the speed of reloading disappears because the empties could get really hard to eject quickly. It was enough of an issue to be addressed in the owner's manual.

 

[cherryriver]

Just to fill in-
My 940, which I purchased used, was a sticky extractor like many, not all, 940s. I sent it back to Smith, on their dime, and they worked it over to correct not only the barrel flaw it had, but to replace the cylinder with a new one. They touched up the action, too, and then sent it back. Still, all on their dime.
It runs perfectly now, extracting White Box, Gold Dots, and any of the various reloads I make up, plated, lead, and jacketed. In fact, the empties drop right out, showing possibly the main advantage of moonclips in revolvers: positive, glitch-free extraction, which is all the more pronounced in the shorter case sizes like 9mm and .45.
Apparently Smith had some trouble with the chambers when they were in production. I don't know if they have any more of the replacement cylinders, but the gun is superb, now.
With a couple dozen moonclips on hand, you can shoot 'till it glows.

 

[edrice]

Mark at Pinnacle converted my S&W 625 .45 Colt Mountain Gun to moonclips so that it will now also shoot .45 ACP as well as .45 Colt.

He did a quality job and as a result, he now has a Ruger Speed-Six cylinder for the moonclip conversion.

Ed