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Old May 13, 2008, 08:40 AM   #1
Magnum Wheel Man
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10 mm Magnum Revolver ???

so 1st off, "thanks" to the forum member that posted the link to the 10mm forum on one of the 10 mm threads here... ( I now have another project that I really needed like another hole in my head )

I had posted a thread over there asking how many had a 10mm Magnum... I have an Automag 4, & a custom 10 mm Magnum Contender barrel... anyone that knows me ( & can likely guess from my forum name ), knows I'm a revolver guy a heart...

well... I never gave a 10mm Magnum revolver a 2nd thought... but seems several people are converting S&W 610's over to 10mm Magnum... I had no eye deer... well a quick look at the S&W website, shows the new revolver is machined for moon clips ( & the clips for 10mm are offered from S&W ), & the guns can shoot 40 S&W, as well as 10 mm... my local gun guru already has the 10mm magnum chamber reamer from doing my Contender barrel... he could easily do the cylinder from the 610, which would give me a stainless revolver capable of shooting 40 S&W, 10 mm, & 10 mm Magnum... I'm really liking the concept, & untill yesterday... I just had no clue... I love the 10mm magnum cartridge, & bought a 1000 Starline brass when I bought the Automag 4 many years ago... but I really hate chasing brass, even "off the shelf" reloadable brass... I really hate chasing custom brass around, auto shucked out of a bottom feeder

anyone here have a 610 converted to 10mm Magnum ??? ( yes I know it's nearly the same as the 41 magnum ) but would be an easy convert, & pretty practical... if I had the gun... I'm actually pretty excited about this...

for any not familiar... this is the gun ( also available in 6" barrel for the same price )...

http://www.smith-wesson.com/webapp/w...egory_rn=15706

your guys thoughts ???
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Old May 13, 2008, 01:07 PM   #2
20nickels
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I'd do it. It had crossed my mind before when looking at the 610. but I was unsure of OAL of the 10mm Mag. The only drawback I could possibly see is reduced accuracy with .40 S&W, but you never know till ya try it.
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Old May 13, 2008, 06:53 PM   #3
kgpcr
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They have been around for years!! they are called a .41 mag and i love mine!!
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Old May 13, 2008, 07:16 PM   #4
Aqeous
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I think that might have been one of my threads. . .

Your welcome


At any rate . . . thats one fine idea. Though I have nothing to offer here, I'll will be watching this thread very closely.
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Old May 13, 2008, 08:27 PM   #5
KurtC
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Back in the 1990's, I had Hamilton Bowen convert a 610 to 10mm Magnum. He even restamped the barrel.

200 gr velocity was up over 1500 fps. However, you must really crimp the bullets or they will creep out and jam the cylinder.

Standard 10mm shot OK, but the .40 S&W produced shotgun patterns. Most likely due to the excessive freebore.
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Old May 21, 2008, 11:36 PM   #6
DWFan
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The overall length of the 10mm Mag is 1.56". Use a roll crimp die for a .38-40. The Lyman #403169 260gr bullet resized to .401" works well for a heavy bullet load. You could probably use 6.8 SPC brass cut off at the shoulder if the 10mm Mag brass gets hard to find.
My cousin has a Blackhawk rechambered for a 10mm Mag Rim made from .375 Winchester brass with a 7.5" .38-40 barrel.
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Old May 4, 2009, 07:35 AM   #7
Magnum Wheel Man
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it's been a long time... but I finally bought that 610... of course my luck, it was bad as new from S&W, & had to go back to the factory 3 times before it was worthy of the S&W name... but chambering the cylinders deeper to fit the 10 mag was easy... we chose a radiused step at the case mouth in an attempt to keep from deforming the 10mm & 40 S&W bullets so much... the 10 mag still headspaces on the case mouth fine, & works with the moon clips...

I put my 1st 2 cylinders of 10 mag ammo through the gun this last week end... a big step up in power from the 10 mm cartridges... interestingly, the gun shot to point of aim, as I had adjusted it from the 10mm from the last shooting ( before deepening the chambers ), & pt all 6 shots into a 4" group at 50ft using a wood block on my bench as a field rest... these were my starting loads for my Automag, & not my most accurate loads to date... but I thought not too bad... with 190 grain bullets, the gun kicked about the same as any 41 or 44 mag with similar bullet weight... next week end I'll be trying both some 10mm & 40 S&W loads, as well as moving up to the next 2 stronger of my 10 mag loads...
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Old July 29, 2009, 10:51 PM   #8
indigo-357
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Nice info

Any updates on the 10mm?

I'm having a New Vaquero converted to 10mm. I was set on getting a 40SW cylinder for it, maybe I'll get a 10mm Mag cylinder too.
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Old July 30, 2009, 06:15 AM   #9
Magnum Wheel Man
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everything has been working like it was made for it, the factory 40 S&W I had on hand shot about the same at 50ft, as the 10mm pretty happy over all... it'll be likely this winter before I can load some cartridges specific for the revolver...I've been waiting for XTP's & Gold Dots to fill the pipeline again & find their way to the store shelves, so I can stuff them into some 10 mag cases...

... I'm not sure of all the pressures, but the 10 mag may be hotter than what is safe in the new Vaquero ??? it's probably close one way or the other... I have a pair of Montados, & I really like them... it would be really sweet to have one in 40...
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Old July 30, 2009, 12:36 PM   #10
indigo-357
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Hamilton Bowen is converting New Vaqueros to 6-shot 41 mags, or so his website says, so I'd assume the 10mm Mag would be fine with similar pressures and thicker walls.
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Old July 30, 2009, 01:54 PM   #11
CraigC
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If the 10mm Mag runs at lower or similar pressures to the .41Mag, it should be okay. Sixgunsmiths have been converting Old Model .357's to .41Mag for years with just a simple rechamber and a new barrel (or rebore).
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Old October 19, 2010, 02:12 PM   #12
shooting4life
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Here is my 610 no dash converted to 10mm magnum

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Old October 19, 2010, 03:08 PM   #13
Magnum Wheel Man
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way cool !!! no lock, nice grips, & a custom chambering... if you want to chat about loadings some time...
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Old October 19, 2010, 03:47 PM   #14
Magnum Wheel Man
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just realized I never got a pic of mine in this thread... a while back I had a custom rear adjustable sight base made that fits the Williams fiber optic ghost rings, & added a fiber optic front sight as well... not a good pic, but what mine looks like right now...

BTW... I just shot mine again last Saturday, my budy was over with his muzzleloader to sight in for hunting... he was shooting 150 grains ( 3 pellets ) of powder, & when I touched off my 1st 10 mag round... he was startled by the bark it's much hotter than the 10 mm... I also shot one clip of 40 S&W, the 1st since I got the gun sighted in good for the 10 mag... & it shot low about 8", but the group was still quite respectable at 4" at 50ft...



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Last edited by Magnum Wheel Man; October 19, 2010 at 04:00 PM.
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