S&W 25 Mountain Gun 45LC, can I have it machined for moonclips and shoot 45acp too?


June 9, 2007, 09:32 PM
Title says it all. I'd like to be able to shoot 45LC, 45AR and 45ACP in one gun. That would be pretty sweet I think. Is this doable or do I have to get a custom cylinder?


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Jim Watson
June 9, 2007, 09:41 PM
I don't know how well it works, but it can be done:

Smith & Wesson, J-Frame 5 Shot, K-Frame 6 Shot, L-Frame 581,681,586,686 & 686 plus, N-Frame 27/28, 57/657, 29, 629, & 625 LC. $80.00 (.45 LC cylinders can be cut to shoot both ACP and LC)

That will probably not handle .45 AR. The conversion will cut to take clipped ACPs but leave enough of the rear of the cylinder intact to headspace .45 Colt. No room for the thick AR rim. If you had it cut to take ARs, it would then not run with L.C., or not reliably.

June 9, 2007, 09:46 PM
You can buy a second cylinder for a .45 Colt revolver and have it fitted up and headspaced for .45 acp.
You cannot shoot both calibers through one cylinder because the headspacing requirements are different.
You cannot convert most of the current .45acp revolvers to shoot .45 Colt because the barrels are set back further into the frame to reduce bullet jump and this does not allow enough space in the frame cylinder window for a .45 Colt length cylinder to fit.
I can offer a real close estimate for having the work completed including the cost of the new cylinder assembly, about $400.00 HTH

June 9, 2007, 11:51 PM
Like Jim said, ACP and Colt are possible, but no AR. I know someone with a Pinnacle converted .45 Colt MG and he absolutely loves it; I was thinking of getting mine done too :)

June 10, 2007, 08:33 AM
You will occasionally see articles about people converting 45 LC's to Auto Rim's or just 45ACP's. The most common conversion is the additional cylinder. And you see the occasional Ruger single action with an additional cylinder.

But the bottom line is these conversions are expensive, and the dual use revolvers start out expensive but sell on the used market for just a little more than a 45 LC. These dual cartridge pistols turn out to be a poor solution to an non existing problem. There is no such thing as cheap 45 ACP, the 45LC is easily downloaded to 45 ACP level, and the 45 LC is easily up loaded to power levels that are not practical in the 45 ACP. Why hot load a 45 ACP to shoot in a revolver.? And you will have to segregate that ammunition or you will fire it in your M1911. So now you have extra ammo boxes lying around.

Also, what do you do with the spare cylinder?. It just rolls around on the table or bench and is in the way. If you lose it, well you are out some big bucks to replace, and it does not fit well in the box or a holster. And don't forget the screwdriver for the change out.

Folks generally get these things, take them to the range once, brag out the new multitasking toy they have to their friends, find out that they have to totally readjust their elevation and windage settings each and every time when they change cylinders, decide the whole thing it is not worth the bother, and sell the things off at a loss.

June 10, 2007, 08:48 AM
If you were to have the cylinder machined like so (www.moonclips.com), yes, you should be able to use all three; the 45 AR and 45 Colt would headspace on the rims, and the 45 Auto would headspace on the clips.


June 10, 2007, 08:55 AM
I just purchased a S&W 625-7 that fires both 45 Colt and 45 ACP. Nicely done; I believe to be a Pinnicle gun.

June 10, 2007, 11:26 AM
I now understand how that works.

June 10, 2007, 12:25 PM
LC is for Long Colt = Revolvers / apc = .45 auto / keep it that way

June 10, 2007, 12:40 PM
LC is for Long Colt = Revolvers / apc = .45 auto / keep it that way
Sorry, but both the Colt and S&W M1917 revolvers beg to differ with you. The many S&W 625s that the factory as 45 ACP/AR only revolvers likewise disagree.

June 10, 2007, 02:15 PM
LC is for Long Colt = Revolvers / apc = .45 auto / keep it that way

Sorry, but both the Colt and S&W M1917 revolvers beg to differ with you. The many S&W 625s that the factory as 45 ACP/AR only revolvers likewise disagree.


.45 ACPs in moonclips are GREAT in revolvers!

June 10, 2007, 03:37 PM
Yes you can have it done with .45LC and ACP (I'm not sure about AR, that would be a small bonus) and from what I've read It is still accurate dispite the amount of freebore bullet jump. I drool at the thought of this combination plus a matching levergun.

June 10, 2007, 04:08 PM
If you start with a flush cylinder rear, a la the .45 ACP 625's, you could use thinner moonclips on .45 Colts and a slightly longer fp to insure that the primers are struck properly. Of course, the mouth step in the original .45 ACP position in the chambers would have to be moved - maybe just removed! Then, you could take all three - .45 AR/ACP/Colt - the latter having a deeply seated bullet due to the short cylinder length.

Now, moonclip a .45 Colt IS do-able. But, the .45 AR's thick rim will prevent the .45 Colt set-back from working - that AR rim is thick! Of course, set it back appropriately for the AR's thick rim and add a longer fp for insurance with those .45 Colt/moonclipped ACP's, and you'll likely hole those thick-rimmed AR primers. Too many variables for me... I have a 625JM for .45 AR & ACP, and a pair of 625MG's in .45 Colt that are inherently dual ammo. They take .45 Colt AND .45 S&W/Schofield! Yep, and include the shortened .45 Colt cases made by Starline for a fellow on 'sixgunner.com' as '.45 Special', and you have another type of ammo for the .45 Colt 625MG!


PS The .44 Magnum chamber is inherently the most adaptable - .44 Russians, Specials, and Magnums. You want to recall .22LR plinking with a revolver? Try some 240gr LSWC over 3.6gr Titegroup in a .44 Russian case - it'll make around 700 fps from a 4" 629 - an all-day-plinker, and still easily make major power factor.

June 10, 2007, 07:04 PM
It is still accurate dispite the amount of freebore bullet jump.

I have wondered about that. The difference in OAL is quite a bit.

What about going in the opposite direction-converting a 625 in .45 ACP to 460 Rowland? Anyone have any experience with it?

Clark 460 Rowland Conversion (http://www.clarkcustomguns.com/revserv.htm#rowland)

June 10, 2007, 10:59 PM
ZONAMO, Tell us about your 460 Rowland conversion!
I'm thinking about selling my M-29's and converting 625's to the Rowland.
A full moon clip of .45 mayhem or plinking with ACP.

June 11, 2007, 12:22 AM
Sorry earplug, shoot a lot of .45 ACP but don't have a .460 Rowland conversion yet. I was hoping someone that does would share their experience.

June 11, 2007, 09:58 PM
"The only purpose served by the extended Rowland case is to prevent it from being chambered in guns not properly prepared to handle the cartridge". The bullet is even seated to the same spot as .45 ACP.

This being the case, why not just convert the cases instead of the cylinder? I have no experience at this, but I don't see why not. I would like to hear answers from experienced reloaders

June 11, 2007, 11:36 PM
I think .45 Auto-rim has a much thicker rim than .45 LC... don't think the two are interchangeable.

June 13, 2007, 02:44 PM
My gunsmith provided, and fitted an extra cylinder for my old S&W 25-5. I have enjoyed shooting .45 ACP in this revolver. I use full moonclips. The accuracy is exellent, and the cylinder swap is quick and easy.
I see no downside with this.


June 13, 2007, 02:54 PM
Thank you all for the great info. A second cylinder seems like the way to go so as to not affect the value of the gun (aka being able to undo the modification), although, machining the current cylinder for moonclips would be less expensive.. Anyone have a line on a blue model 25 45LC cylinder that I can get cheaply and have machined?

June 15, 2007, 09:37 AM
I see them on ebay occasionally, usually a converted .44 cylinder.

December 1, 2007, 07:03 PM
I finally took the plunge and sent my cylinder to Pinnacle. Yesterday I got email saying it was finished and would ship soon. I can't wait!!:D

December 2, 2007, 02:24 AM

Believe it or not, you have what it is probably the first of these conversions.

Back in the early 90's, I had the idea after seeing a moon clip conversion for a .44 Magnum. The late Art Leckie (Austin Behlert's son-in-law) in Pipersville, PA, agreed to give it a try on my donor gun (your 25-7). It turned out successful, so we also did it to a Ruger Redhawk and a Colt Anaconda, along with a few 625's.

A few years later it caught on (with the help of the internet), and now several shops are doing it.

On your 25-7, the polished blue and laser scrolling are factory. The conversion was done later on, and that is why the extractor bluing is different. The round butt conversion was done by me. Art Leckie also milled the front ramp to accept replacement sights.

December 2, 2007, 03:00 AM
I'm glad I ran into this thread. I may be giving Pinnacle some work very shortly so that I can get better use out of a few revolvers here.

December 3, 2007, 08:17 PM
I shipped my Cylinder to Pinnacle Customs on 11/14 and got it back today 12/3. I have never experienced a turn around that fast with ANY vendor, gun related or otherwise. Communication was excellent as well.

The first thing I notice when I removed the cylinder from the package, was that the machining is definitely top shelf. It is perfect. I cannot tell that it did not leave the S&W factory this way. Well, that's not true. It wouldn't have left the factory this good. :D

After reinstalling the cylinder, I dry fired the gun a dozen times, no binding or any other surprises. Then I loaded it up with some 45 Colt brass, rocked the hammer back slightly and spun the cylinder, no drag. Same thing with a moonclip of 45acp brass.

Off to the range I go with a mix of various ammo, reloads and factory. First, the 45 Colt ammo which was Remington factory 225gr LWSC. This ammo is warmer than the cowboy stuff but still mild and was very accurate in this gun previously.
There was no change. It all went bang and all went in a quarter sized ragged hole at 10 yards.

Then comes the 45acp. First, I loaded up a moonclip of 230gr Blazer Brass factory ammo and blasted it away double action as fast as I could pull the trigger. It all went bang and hit the target. OK, now it's time to check accuracy. I start off with my IDPA load which is a 230gr Remington FMJ on 4.0grs of Hodgdon Clays. This is a "one ragged hole" load in my 4" 625-3 that I use for ESR. Four cylinders full and the best I could do was 3 shots touching and 2 flyer's per 6 shot group @ 10 yards. Hmmm....
Then 3.7grs Clays on a hard cast 230gr LRN, 230gr moly coated cast on 3.5grs Clays and 230gr Berry's plated RN on 3.9grs Clays. All had similar patterns to the first.
Lastly, I fired 6 rounds of Federal 230gr +P HST defense ammo and it all went in a golf ball sized group.

Well, I'm not sure what to think about the accuracy of the gun using 45acp at this point. I should've taken my 625 along for comparison and to prove to myself if it was the gun or me throwing the flyer's. I wonder though since it shot exactly the same with the 45Colt load as before.

Pinnacles work is perfect and I highly recommend them to everyone. Whether or not this particular gun will benefit from the work, the jury is still out.
More range time is needed.

December 3, 2007, 09:19 PM
Please keep us up to date as you do more shooting. I really appreciate you coming back to let us in on how it went. I was thinking about doing an Alaskan like this or the 625MG like what you have. I still may send it off to them.

Guy B. Meredith
December 4, 2007, 01:59 PM
Re: "LC is for Long Colt = Revolvers / apc = .45 auto / keep it that way"

I don't know about conversions, but 625s produced for .45 ACP are highly popular among competitors.

December 4, 2007, 02:22 PM
IMO that pic of the slightly engraved, non-fluted cylinder made a handsome gun even nicer to look at. And .45 acp or .45 LC is plenty of gun for most uses.

but that's just me....

December 4, 2007, 03:00 PM
Here is a woods stomping pair... sure, my 625JM can reload faster with moonclipped ACPs - and I have loaded ARs a tad warmer than .45 Colt. There is just something neat about the first revolver round I tried - the .45 Colt - and this, my first-ever S&W - a 625MG in .45 Colt. I really like the 'traditional' shortened lug, chafered cylinder, and tapered barrel. I liked it so much I bought a '96 version just like it. The Buck Kalinga Pro (#408), with an S30V blade, is new this fall.


PS Just what kind of cost is invlolved in the ACP conversion... how can I get in touch with Pinnacle... ?

I know, I said I wouldn't... but...

Lloyd Smale
December 5, 2007, 06:47 AM
i had a ruger 454 alaskan cut for clips and it will shoot acps with clips and 45colt and 454s with or without clips.(obviously differnt clips) acps feel like 22s in it but the between the fact that the point of aim is about 8 inchs off and accuracy is pretty dismal it would be about good only for a survival type use.

Dave Markowitz
December 5, 2007, 09:41 AM
LC is for Long Colt = Revolvers / apc = .45 auto / keep it that way

You obviously have never shot a S&W Model 625.


It is the most accurate revolver I've ever seen.

December 5, 2007, 05:44 PM
I cleaned the gun thoroghly and took it back to the range today. I must have been having a bad day Monday (like time at the range could actually be bad), because today, it shot great! 12 shot groups fired off hand and double action at 15 yards under 2" consistantly. Whew! I feel better now. This one is definitely a keeper. :D


December 6, 2007, 12:18 PM
Tex, what did it cost? Did you send the orignial cly or replacement? Does it need special moon clips? And are there compII or III type speed loaders for this gun in 45LC? My wheels are spinning a hundred miles an hour!
Thanks, Lenny

December 6, 2007, 12:24 PM

I sent the original cylinder along with a check for $87 which included return shipping. It uses standard full moon clips. To my knowledge the only speedloaders for the 45LC in this gun are the HKS 25 or 25M. No comp II or III.

December 6, 2007, 12:36 PM
Have you ever weighed it? I'm think IDPA SSR (if less than 42oz) and ESR. I know it may not be the MOST competitive set-up but fun is fun. $87 sounds like a bargain to me!

December 6, 2007, 12:46 PM
I weighed it just now after reading your question. Empty weight is 39.1 oz. That easily makes weight for IDPA ESR or SSR. :D

December 6, 2007, 05:41 PM
I was under the impression that .45acp used .452 bullets and .45LC used .454? Is this correct and could it be causing slightly less accurace with the .45acp loads?

December 6, 2007, 05:58 PM
Brasso, I believe .454 was the "old" standard diameter for the Colt. Somewhere along the lines they went to .451, .452. Someone more knowledgable could shed some light.

December 6, 2007, 07:40 PM
The 625MG in .45 Colt uses the HKS #25-5 speedloader for .45 Colt, while the straight HKS #25 speedloaders have the wide-spaced tines needed for the .45 Auto Rims' thick rims. It will actually hold the .45 Colts - but they are loose. I also used the HKS #25-5 with my .454 SRH and .45 RH - with .45 Colts.


December 6, 2007, 09:11 PM
Prior to WWII standard 45 Colt groove diameter was .454. In 1956, 45 Colt groove diameter was changed to .451 to match 45 ACP groove diameter.

December 6, 2007, 10:11 PM
For .45 Colt, I use the S/L Variant "jet-loaders" made in Germany. There is a spring behind each cartridge that throws it into the chamber. The size is based on the diameter of the case, not the rim, so this model works with both .45 Colt and Auto Rim. No rattling, since they are under spring tension.


December 10, 2007, 11:36 AM
Anybody know, Is there any reason you could not shoot .45 win mag through this newly converted cylinder and still retain the use of full moon clips? I just realized 1/2 or 1/3 clips would not work due to the outside lip holding the Colt rims.
I cannot find OAL of .45 win mag cases.

November 13, 2008, 10:18 PM
Question for today is If I have a 25 or 625 which gas been modified to shoot both .45 ACP and ,45 LC, can I safely shoot .45 Win Mag in it. Or will this cartridge bend my frame? lol

July 30, 2009, 10:50 AM
I am pulling this one out of the grave yard and want to know about the 45 gap load, could you put it in the acp moonclips and shoot it? I am not looking at this as a primary load for the gun but just as a gee wiz as another round that this gun could shoot. I am looking to have this conversion done to my 45lc mountain gun. HighVelocity how is your accuracy now? I know its been a while but is it still good in your gun. Have you had good range days with this gun?


Dr. Tad Hussein Winslow
July 30, 2009, 02:34 PM
If you do have pinnacle mill a .45 colt for taking .45 acp clips, is there ANY drawback whatsoever? Is there any additional risk of light primer strike on .45 colt?

Dr. Tad Hussein Winslow
August 1, 2009, 09:00 AM
KurtC, what model is that? Beautiful gun. And what grips?

For those with black 625s, what finish was applied to make the stainless steel black? Aren't all 625s by designation, stainless steel models?

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