Model 10 and 27 cylinder modification for 9mm?

[MuayThaiJJ]

Hi gang,

Is it possible to machine the 10-5 and 27-2 cylinders to take 9mm moon clips? Are there 9mm moon clips for Model 10 and 27?

thanks!
N

 

[Protocall_Design]

I bet JDinAZ right here on the forum could do it for you. PM him and ask. I think it's always good to support our forum dealers.

 

[stansdds]

I would not cut a Model 27 for 9mm moon clips. The N-frame is way overbuilt for the 357 Magnum, my personal opinion is that it would be a waste of heavy steel to alter one to shoot 9x19mm. Also, the Model 27-2 has recessed chambers, according to TK Custom, recessed chamber cylinders cannot be modified for 9x19mm.

Modifying any 38 Special or 357 Magnum revolver to shoot 9x19mm may make for a relatively inaccurate 9mm revolver. 9x19 bullets are usually 0.355-0.356" diameter, if the groove diameter of the revolver's barrel is greater than 0.356", I would expect less than stellar accuracy and excessive leading when using cast lead bullets. Just my opinion, likely worth exactly what you paid for it.

Then there is the expense of this modification. TK Custom advertises $350 to machine a cylinder and they warn to use only standard pressure 9x19 ammo, not NATO, +P, or +P+ ammo. $350 puts one well on their way to buying a semi-auto pistol chambered in 9x19 or buying a pretty fair amount of 38 Special ammo.

 

[murphydog]

A Forum member regularly posts his N frame that fires and extracts several .36 caliber cartridges with multiple cylinders. In this situation, getting a spare chambered in 9 mm and keeping the original parts intact may be a good idea.

 

[chief38]

I'd not PERMANENTLY modify ANY GUN to take 9mm that was not originally designed for it. Turn your eyes to Mexico where military calibers are banned. Why have to get rid of a revolver because of that if that ever becomes rule here? If you are going to do that at all, I'd use a different cylinder which would allow quick restoration should you ever desire that. OK, some may say I am paranoid, but it's time to look at the facts......

IMHO moon clips are a pain in the butt! Yes they do have some advantages, but not many. Plus.... it's not like 38 spl. isn't still available in many offerings.

Your M27 in 357/38 special is one of the most versatile revolvers available and will shoot everything from snake shot, wad cutters, light target loads, to powerful magnums and everything in between. Can a 9mm do that?

 

[Hair Trigger]

I'm sort of a purist, I can't imagine ruining two nice revolvers to run 9mm in them. By the time you got done paying for the smith work, you could probably buy a M986 anyway.

 

[Tanners Owner]

I had my 627 converted to take 9mm. As another mentioned above I had Make Hartstone from Pinnacle High Performance acquire another cylinder for the conversion. So have the best of both worlds.

Story is here

Converting my 627 to shoot 9mm

 

[steelslaver]

Here is a model 10 cylinder so modified,

It would be no harder to waste an N frame cylinder in such a manner. N frames should be made bigger, not smaller. LOL

 

[MuayThaiJJ]

Here is a model 10 cylinder so modified,

It would be no harder to waste an N frame cylinder in such a manner. N frames should be made bigger, not smaller. LOL

Cool, do you have issues with shooting 38SPL out of it still? How is the accuracy with 9mm on the Model 10?

 

[Tanners Owner]

In my 627 mentioned earlier, I’ve found no appreciable accuracy difference in my ASI or USPSA games between the 9mm & 38/357 cylinder ( shooting 38s)

 

[petemacmahon]

Pinnacle High Performance

I had my 627 converted to take 9mm. As another mentioned above I had Make Hartstone from Pinnacle High Performance acquire another cylinder for the conversion. So have the best of both worlds.

Story is here

Converting my 627 to shoot 9mm

Tanners Owner,

Just spoke to Mark Hartshorne late last week. I've had a Model 66 sitting in his shop for about 8 months waiting for this very conversion + other mods. I'm sorry to report, but he is closing up shop. He never got to my project and I have to now go collect it up. He said he had some life challenges/changes and could not make a go of it and accepted another full time position as a machinist. I'm totally bummed, because searching the internet, it appears I have no choice but to go to TK Custom and their $350 fee is allot steeper than Mark was going to be. Plus, I have to find someone else to do the other mods I had in mind for that platform. In the end, I hope to have a 66 with three fitted cylinders: 1) standard, 2) 9mm conversion, 3)38 Super conversion - on a 2.5 inch DAO model 66.

As to all the naysayers in other posts above:
1) This is not my only K frame, least you think I don't respect the platform. This gun was purchased as a project gun.
2) Come on - you have to admit, having a bug out gun that can shoot 4 (maybe more in a pinch) worthy self defense rounds is pretty cool.
3) Because I can

 

[steelslaver]

Cool, do you have issues with shooting 38SPL out of it still? How is the accuracy with 9mm on the Model 10?

I have never fired it from my Ransom rest to check actual accuracy. I have only fired a few cylinders full of 124 gr through it to check function and basic accuracy. Seams OK. Never fired any 38 special ammo in it yet but I am sure the bases would be slightly swollen, but probably re loadable. A 9mm case's base is is only .060 larger than a 38 special. I made the 9mm cylinders because I had plenty of K frame 38 cylinders, I was ordering a rental reamer for another project anyway and it is nice to have the ability to fire a common caliber even though I have very little interest in the 9mm. The cylinder just sit in my collection of interesting gun stuff.

I had previously bought some clips from TKC to modify for my experimental K frame cylinder that fires 22TCM.

 

[Tanners Owner]

Tanners Owner,

Just spoke to Mark Hartshorne late last week. I've had a Model 66 sitting in his shop for about 8 months waiting for this very conversion + other mods. I'm sorry to report, but he is closing up shop. He never got to my project and I have to now go collect it up. He said he had some life challenges/changes and could not make a go of it and accepted another full time position as a machinist. I'm totally bummed, because searching the internet, it appears I have no choice but to go to TK Custom and their $350 fee is allot steeper than Mark was going to be. Plus, I have to find someone else to do the other mods I had in mind for that platform. In the end, I hope to have a 66 with three fitted cylinders: 1) standard, 2) 9mm conversion, 3)38 Super conversion - on a 2.5 inch DAO model 66.

As to all the naysayers in other posts above:
1) This is not my only K frame, least you think I don't respect the platform. This gun was purchased as a project gun.
2) Come on - you have to admit, having a bug out gun that can shoot 4 (maybe more in a pinch) worthy self defense rounds is pretty cool.
3) Because I can

My 9mm cylinder is actually chambered for 9x23 Win IIRC, enabling that cylinder to fire 9mm, 38 super, 380, & 356 TSW. Naturally, I shoot 9mm as it’s cheaper & readily available.

Sorry to hear about Mark closing shop, he was a pleasure to work with, a true custom gunsmith

 

[MuayThaiJJ]

I bought an extra model 10 cylinder and sent it to Eli at TK Custom for his conversion to 9mm moon clips. I read somewhere that 38/357/9mm all share the same bore dimensions. Is this true?

My Model 10 is a PPC, and I've shot it once. My god, it is so accurate. First shot, a bullseye at 10 yards. I am curious how accurate it will be with a 9mm cylinder.

Can someone explain to me why recessed chamber cylinders cannot be modified for 9x19mm? Does that mean the cylinder sits too far from the breech for the firing pin to reach if the cylinders are converted for moon clips?

 

[petemacmahon]

My 9mm cylinder is actually chambered for 356 TSW IIRC, enabling that cylinder to fire 9mm, 38 super, 380, & 356 TSW. Naturally, I shoot 9mm as it’s cheaper & readily available.

356 TSW....hmm, you've got me thinking now!

 

[Tanners Owner]

356 TSW....hmm, you've got me thinking now!

Pete, I was in error, it’s chambered in 9x23. I reread my original post about converting it and found that’s what I did. Apologies for any confusion

I’ve been very pleased with this conversion. It’s easy to swap out and I retain the original capability and now have multiple cartridges I Ian shoot thru the additional cylinder.

I’ve shot this in some ASI, USPSA and outlaw matches- a really fun gun.

Good luck and keep us informed of your journey

 

[MuayThaiJJ]

So, why can't a 27 cylinder be machined for 9mm moonclips? Can the 929 moonclips be made to work for the 27 cylinder?

 

[bmcgilvray]

I would not be interested in using 9mm in a revolver at all.

When I was young I obtained some 125 grain jacketed soft point 9mm component bullets in a box of old reloading supplies.

I loaded them up in .38 Special cases under a suitable charge of Unique and shot them away in a Model 10. They gave fine, useful accuracy.

 

[glenwolde]

I have one of the Ruger convertibles. The 9mm is meh. It works but accuracy suffers. Forget cast lead .356, but if you're relaoding might as well use .358's they work fine. But why? It won't do anything much better than the .38, let alone the .357.

I was thinking about having the 9mm cylinder reamed to .357/.41 (or .44) B&D. But I think my Big Magnum days are over, I may be getting too old for that. How about .357 SIG? That might be fun.....hmmm.....nah, the .357 will suffice. Oh well.

 

[steelslaver]

So, why can't a 27 cylinder be machined for 9mm moonclips? Can the 929 moonclips be made to work for the 27 cylinder?

You could modify model 27 or 28 cylinder to 9mm and you could do it with a recessed.cylinder. model 929 clips won't work because they hold more than the 6 rounds in 27 or 28 cylinder
Recessed cylinder would end up with a rim all the way around is all, plus machining out more material in center before cutting the recesses