[NoJoy]

Here’s an interesting alternative to shooting 41 Magnum. This round can be chambered in the S&W model 610. And probably the Ruger 10mm revolvers.

You will need to send your revolver off to Pinnacle Performance to have your cylinder chamber reamed out a bit. When completed, you can shoot 40 S&W, 10mm Auto and 10mm Magnum. Using moon clips. It is expensive at $2.00 a round, but I think as a outdoor and packing revolver/ammo combo, makes sense hiking in black bear country.

There are of course other options for this, like a S&W m29 4” or Colt Anaconda 4.25” It’s great to have options!

Search: 6 results found for "10mm Magnum"

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[NoJoy]

Left to right: 41 Magnum, 10mm Magnum, 10mm Auto and 40 S&W

 

[JK-linux]

I’m guessing this is a revolvers only caliber? Makes me want a 610 now!

 

[NoJoy]

I’m guessing this is a revolvers only caliber? Makes me want a 610 now!

Yes. It’s too long to fit in any magazine. If the case was 2mm shorter, the 10mm Magnum could fit in a FK BRNO magazine-

 

[NoJoy]

Left to right:

135gr 10mm Magnum, 95gr 7.5 and 180gr 10mm

 

[Borg Warner]

I’m guessing this is a revolvers only caliber? Makes me want a 610 now!

The 10mm magnum was originally chambered in the AMT Automag IV which was a large single action made by Arcadia Machine and tool company (AMT). The mkIV was created by Harry Sanford, inventor of the original 44 automag pistol. The mk 4 fired the .45 Winchester magnum round; however in 1992 and 1993 it was chambered for a time in the obscure 10mm Magnum cartridge. It has a 7- or 8-round magazine and is made of stainless steel.

Here is a picture of a Mk III which was chambered for the 30 M1 Carbine cartridge and looks almost identical to the Mk IV.

 

[tomrkba]

What does 10mm Magnum get me over 44 Magnum?

 

[NoJoy]

What does 10mm Magnum get me over 44 Magnum?

44 mag is more powerful and useful in the woods. Just depends on the size of revolver people are willing to carry and recoil control.

With the m610, you can shoot all three rounds. A little more versatile than the 41 magnum.

 

[AIRB0RNE6176]

With this new knowledge of the chamber work for the S&W M610 to shoot 10Mag (+ 10mm & .40S&W), I'm seriously considering it as I've done this type of moon-clip mod on my 6.5" M25-15 to shoot .45ACP & .45LC.

Regardless, I highly recommend the 610 for any 10mm shooter & fan. My 6.5" 610-3 here with a "random" 10mm striker...

 

[Rob96]

Last I had heard was that Pinnacle had closed up with no warning.

 

[NoJoy]

Last I had heard was that Pinnacle had closed up with no warning.

Not good! I’ll research another gun smith to see if they can do what Pinnacle used too.

I believe Clements Custom Guns is out of business also. They used to do 10mm conversions for various revolvers. I got my 5” Ruger GP 100 converted to 10mm.

 

[AIRB0RNE6176]

I'll check with TK Customs later this week, since they're the ones who did my Model 25's .45LC cylinder to accept .45ACP in moon-clips.

Hopefully, they can point us in the right direction...

 

[NoJoy]

I'll check with TK Customs later this week, since they're the ones who did my Model 25's .45LC cylinder to accept .45ACP in moon-clips.

Hopefully, they can point us in the right direction...

Awesome. If they can do the work on a model 610, let us know. They could be getting more business their way, since the other shops are closed-

 

[agtman]

Left to right: 41 Magnum, 10mm Magnum, 10mm Auto and 40 S&W
View attachment 1260309 View attachment 1260310

Very nice!

Homage to the original platform:

Today we have better and heavier 10mm/.401 hardcast slugs to run at full 10mm Mag speeds, like Bengal Bullets, 240grn coated and g.c.-ed WFN boolit:

https://www.glocktalk.com/threads/bengal-bullets-10mm-240grn-coated-wfngc.1980996/

As the above thread chatter suggested, this slug might be too long to leave much room in the case for powder in a 10mm AUTO, but in the 10mm Mag case it’s a different story.

Also the arrival of Winchester’s 400 Legend - using 200+grn .401”-dia jacketed bullets - opens up further handloading options for the aggressive 10mm Mag owner.

 

[Tony Rumore]

The pic posted above by agtman is my gun/pic.
I have an IAI (AMT) Automag IV in 10mm Magnum, as well as an 8" LAR Grizzly in 10mm Mag.
I also have a Herters 401 PowerMag which is basically a rimmed version of the 10mm mag, however it uses .403" diameter bullets.

Tony Rumore
Tromix

 

[FullClip]

And another Herters Powermag....not sure what the deal is with the fancy hammer, base pin and trigger.

 

[arkdweller22]

I started a thread on this a few back in 2020.
Here's the link, it has a lot of good info:

https://www.glocktalk.com/threads/10mm-magnum.1843398/

After a bunch of research, I had a 3.8" 610 reamed to 10MM magnum by these guys:

Aria Ballistic Engineering – Ammunition for the Master Marksmen

www.ariaballisticengineering.org

They did a great job.

Ammo can be bought from the same outfit, they're out of Tacoma.
I've also reloaded for it and using AA#9 I've been able to push a 200Gr Montana hard cast to almost 1450FPS, but settled on a bit less powder that is super accurate and consistent at 1410FPS. That's out of a less than 4" barrel.
Out of the same gun I've achieved similar velocities out of a 220Gr hard cast but the meplat is not as wide as the 200s.

I also run a 210 Gr Hawk soft point (I bought these from Aria) at a chronographed 1425. Again, out of the same gun.

I'm tempted to buy a 6.5" 610 and have them ream that one too, just to see the velocities I get. I'm figuring a 75 to 125 FPS boost.

Below L to R a 180Gr handloaded Hornady XTP at 1550 FPS, the aforementioned 200Gr Hard Cast and the aforementioned 210Gr Hawk SP:

I've only used AA#9 for my 10MM Magnum rounds. I'm going to attempt some loads using H110 if I can find some. H110 is a bit more sensitive and susceptible to pressure spikes but I can probably get 200FPS more out of my loads. Not sure if it's worth it, but I'm going to try... eventually. LOL

 

[arkdweller22]

What does 10mm Magnum get me over 44 Magnum?

Depending on your needs and your situation it may get you something. But for most people, nothing really.

44 Mag is more available, been around longer, has many quality bullets available in a myriad of weights (a few of them heavier than anything you can get in a quality .401 bullet) and can be found in most stores that sell ammo.

But for me the 10MM magnum made sense.
I was traveling the country in an RV for four years and had a small reloading setup for my 10MM in my 5th wheel. So I had bullets, dies, primers, etc. pretty much all the components needed for reloading 40S&W and 10MM Magnum other than brass. Since I was traveling out west in Grizzly country and wanted something at the level of 44 Mag without adding the weight and space usage (both are at a premium in an RV) that adding another caliber represented, I went with 10MM Mag. It made sense for me.
Also, I like oddball calibers and experimenting with ballistics so I got a nice dose of that as well.

 

[agtman]

I started a thread on this a few back in 2020.
Here's the link, it has a lot of good info:

https://www.glocktalk.com/threads/10mm-magnum.1843398/

After a bunch of research, I had a 3.8" 610 reamed to 10MM magnum by these guys:

Aria Ballistic Engineering – Ammunition for the Master Marksmen

www.ariaballisticengineering.org

They did a great job.

Ammo can be bought from the same outfit, they're out of Tacoma.
I've also reloaded for it and using AA#9 I've been able to push a 200Gr Montana hard cast to almost 1450FPS, but settled on a bit less powder that is super accurate and consistent at 1410FPS. That's out of a less than 4" barrel.
Out of the same gun I've achieved similar velocities out of a 220Gr hard cast but the meplat is not as wide as the 200s.

I also run a 210 Gr Hawk soft point (I bought these from Aria) at a chronographed 1425. Again, out of the same gun.

I'm tempted to buy a 6.5" 610 and have them ream that one too, just to see the velocities I get. I'm figuring a 75 to 125 FPS boost.

Below L to R a 180Gr handloaded Hornady XTP at 1550 FPS, the aforementioned 200Gr Hard Cast and the aforementioned 210Gr Hawk SP:

View attachment 1260485

I've only used AA#9 for my 10MM Magnum rounds. I'm going to attempt some loads using H110 if I can find some. H110 is a bit more sensitive and susceptible to pressure spikes but I can probably get 200FPS more out of my loads. Not sure if it's worth it, but I'm going to try... eventually. LOL

Nice!

For HC bullets suitable for real 10mm Mag velocities, you should check out Bengal Bullets’ .401/10mm selections. They’re coated and gas-checked. BB may have added more since the 400 Legend was introduced

The IAI AutoMag IV had an 8+” barrel. John Taffin’s original range report and load data article suggested that the ballistics of the 10mm Mag cartridge are best derived from a long barrel, which is also the case with other traditional revolver magnums.

Taffin Test the 10 mm Magnum

I like the idea of magnum snubbies generally, but if I we’re going to do a 10mm AUTO to ——> 10 Mag conversion on a 610, I’d want one with at least a 6” barrel. If I could but find a Ruger 10mm SRH with a 7” barrel, I‘d use that as the base gun.

The only other long-barreled 10mm wheelgun I’ve seen is Cimmaron’s SA ‘cowboy’ gun with an 8” tube. It’s built on the same frame as their .44Mag variant, so strength wouldn’t be an issue in 10mm Mag, but the gun doesn’t accept the use of moon clips like the 610s or Rugers.

 

[jspook]

Nice!

For HC bullets suitable for real 10mm Mag velocities, you should check out Bengal Bullets’ .401/10mm selections. They’re coated and gas-checked. BB may have added more since the 400 Legend was introduced

The IAI AutoMag IV had an 8+” barrel. John Taffin’s original range report and load data article suggested that the ballistics of the 10mm Mag cartridge are best derived from a long barrel, which is also the case with other traditional revolver magnums.

Taffin Test the 10 mm Magnum

I like the idea of magnum snubbies generally, but if I we’re going to do a 10mm AUTO to ——> 10 Mag conversion on a 610, I’d want one with at least a 6” barrel. If I could but find a Ruger 10mm SRH with a 7” barrel, I‘d use that as the base gun.

The only other long-barreled 10mm wheelgun I’ve seen is Cimmaron’s SA ‘cowboy’ gun with an 8” tube. It’s built on the same frame as their .44Mag variant, so strength wouldn’t be an issue in 10mm Mag, but the gun doesn’t accept the use of moon clips like the 610s or Rugers.

If I'm not mistaken you don't have to have moon clips to shoot the 10mm in the S&W 610. Only for the 40 S&W but you can use them if you want to. Makes for quicker load and unload.