Prior to my recent joining of the forum I read nearly every thread in the revolver section.

There was a thread regarding doing the modification to a DW cylinder allowing 9mm to be chambered and fired. The last reference to tha thread that I can find is in February of 2013.   At that point in the thread the originator ( DanWesson 41fan) had finished having the machining done to the cylinder and installed it in the revolver.  However, I cannot find any more information in regards to the project.  i.e. range report, how it functioned accuracy etc.  Does anyone know if there is more on the subject?  Is there an additional thread that I am not finding?  I would love to know how this project turned out.

I have long had an interest in a 9mm revolver.  My research and several conversations with representatives from Ruger, S&W and Charter arms leads me to the conclusion that their 9mm revolvers are a .357 frame and barrel with a cylinder of the same external dimensions machined for a 9mm cartridge.  What I am saying is that in regards to the barrel it is of the same dimensions ( groove to grove) and the same twist rate as a .357.  In reality, for production purposes it is in fact a .357 barrel. I am not referring only to the "convertible" models like a Ruger Blackhawk,  but also to stand alone 9mm models like the Ruger LCR, Charter arms Pit Bull and the S&W 940 and 929.

The cylinder is of the same dimensions physically as a .357 so that it will fit the frame.  Again, for production purposes an entirely new frame need not be designed and produced. This results in a shorter 9mm projectile needing to make a longer passage to /  through the cylinder throat.

My interest would be to take the concept all the way to a 100% dedicated 9mm revolver.  What I mean by that is a barrel made for 9mm only ( not double duty 9mm / .357 ) and a cylinder machined for 9mm only.  If retro fitting an already existing frame I realize that the longer than needed cylinder will need to be retained.  No way around that, but at least it could be designed as a 9mm only. Maybe even head space at the case mouth.

I am not positive but at present the Korth "Sky Marshall" may be the only 9mm revolver with a shorter 9mm cylinder made solely for 9mm.  They also make a 9mm / .357 convertible in another model so I remain suspicious that they may use a .357 specification barrel for 9mm applications. Again, thinking tooling up and production.

I realize the difference between the 9mm and the 38 caliber is only a nominal .002".  However, I have just never been able to grasp the theory of getting one piece of machinery to do all things well.

I welcome discussion on the subject and hope to get some more information on the above mentioned thread.

DD

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