Can a Newer model 610 be rechambered to 10mm Magnum?

[3rdgeargrndrr]

Would love to have a 3 in 1 gun, 40sw/10mm/10mmMag.
Does anyone/ has anyone rebored the recently released 610 to accept 10mmMag?
If not, are the cylinders long enough to rebore the chambers to 1.255" and fit a cartridge to OAL 1.555"?
standard 10mm case length is 0.992" and OAL of 1.260"

Many thanks in advance

 

[colt_saa]

Absolutly - The cylinders have not changed

 

[3rdgeargrndrr]

Absolutly - The cylinders have not changed

Excellent. Thank you.

 

[H Richard]

I believe that was introduced at this years NRA Convention. I think I saw it on a session of Shooting Sports.

 

[SLT223]

Does anyone make 10mm "auto-rim" brass? I'm guessing not since my google search produced nothing. I hate moon clips and love revolvers, that's why I'm asking. I also really like the 4" 610 full lug barrel w/ interchangeable front sight. I wish it was offered in a traditional revolver cartridge....

 

[muddocktor]

Does anyone make 10mm "auto-rim" brass? I'm guessing not since my google search produced nothing. I hate moon clips and love revolvers, that's why I'm asking. I also really like the 4" 610 full lug barrel w/ interchangeable front sight. I wish it was offered in a traditional revolver cartridge....

You know, this post got me thinking that making your own 10 mm magnum rimmed cases might not be totally undoable. First you would need someone who owns both a 10 MM Mag revo and a 41 Mag revo who happens to have some new, never been sized or fired 41 Mag brass to check and see if it will chamber up in a 610. Because looking at specs, the 41 Mag case is only 9 thousandths larger than a 10 MM case. If it will chamber easily, then all you would have to do would be to cut the cases down slightly I would think. If it won't chamber up, then you could have a cylinder reworked to handle a 41 Mag case I would think.

 

[colt_saa]

Does anyone make 10mm "auto-rim" brass? I'm guessing not since my google search produced nothing. I hate moon clips and love revolvers, that's why I'm asking. I also really like the 4" 610 full lug barrel w/ interchangeable front sight. I wish it was offered in a traditional revolver cartridge....

No there is no such thing as 10MM Auto Rim.

It can not be made from existing cases like the 41 Magnum because the case rim is WAY Too thin even if they happened to chamber.

As to the IFS (Interchangeable Front Sight), Smith & Wesson has been using it for almost three decades on many N-frame revolvers.

You can find the IFS on various Models 29, 327, 610, 625, 627 and 629 at the very least. I am certain that my memory has missed a few

 

[oldman10mm]

Referring to posts 5, 6, &7 ^
I put this in a different thread 6 days ago.

A 10mm project I started back in Sept 2016 is attempting to make 10mm rimmed brass for use in my 610.
Sized down 41M with the 10mm die. The area just above the rim that's protected by the shell holder doesn't get sized down, so that had to be 'machined' to diameter. And then trimmed to length. Too much specialty machining.
Took a 30-30 rifle brass and cut it to length with a tubing cutter, ran it into the 10mm die and then trimmed to length. This one seems to be the easiest to do. Only potential problem, and it might end up not being a problem, is the wall thickness of rifle brass, .017" compared to the 10mms' .009". With a bullet seated into it, the OD should expand by .008" on the diameter which would be .004 per wall. Still have to press a bullet into it to see if it'll chamber.
As more 10mm revolvers come on the market, hopefully Starline will start 10mm Rimmed production.

 

[SLT223]

I’ve read forum post elsewhere from years ago (google search) where 30-30 brass has been trimmed to make a 10mm/40 auto rim. I just do t have time. As far as the IFS, I’m well aware it’s been around for years. I have some 44’s so equipped. I specifically like the 610’s configuration where it sports the 4” full lug barrel. Those two features are appealing to me.

 

[Muley Gil]

"I hate moon clips..."

Why? I think full moon clips are the best thing since sliced bread. The last 1 1/2 years I was in law enforcement, I carried a M625 in .45 ACP. During qualifications, I could reload as fast or faster than the majority of my fellow officers armed with semi autos.

 

[oldman10mm]

Yes, unloading & reloading with full moon clips is very fast, no argument there. My project to make 10mm rimmed brass is just to be able to do it, no other reason.

 

[BLUEDOT37]

It can be done... 10AR brass

Does anyone/ has anyone rebored the recently released 610 to accept 10mmMag?

I've converted/reamed mine to 10MAG. No problem with the 1.555" COAL.

Every time I take it to the range to try out new loads people are always asking what I'm shooting. The last guy thought it was a 44 Magnum.

Powder capacity wise the 10MAG has 5.9% less capacity than a 41 Magnum, from my water weight measurements.

Finding good load data, for the various powders I like to use, is the biggest problem for the 10MAG, IMO. It's not like opening a manual & picking 10 Auto load data, since it's essentially a wildcat cartridge.

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Sized down 41M with the 10mm die. The area just above the rim that's protected by the shell holder doesn't get sized down, so that had to be 'machined' to diameter. And then trimmed to length.

It can not be made from existing cases like the 41 Magnum because the case rim is WAY Too thin even if they happened to chamber.

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Before I did my 10 Auto to 10 MAG conversion I made some 10AR brass from 41 Magnum brass & test fired them with full handloads without any issues.

I trimmed the sized down brass (using a 10mm Auto sizer die) to be just under the maximum length for the 10 Auto, .992" long. This length means they are headspacing on the case mouth, just like if you were shooting 10 Auto's without moonclips.

This also means the larger (unsized/partially sized) diameter of the case near the rim is above the chamber opening & I had no problems inserting/removing them, before or after firing.

And even though the rim of the case is not touching the face of the cylinder they still easily extract using the ejector, just like a regular rimmed cartridge does.

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10Auto & 10AR cases
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I was going to buy 10MAG Go-No Go gages from Dave Manson for my conversion but he said it'd be weeks before they could be made so I passed.

Decided all I needed was a few longer than normal 10MAG cases but since all the new Starline 10MAG brass I bought was barely over minimum that wasn't going to happen.

Since the 41 Magnum is longer I sized them down with my 10mm Auto sizer & then trimmed (2) to the Go-No Go lengths I needed, which solved my problem.

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Yeap, they're bigger.
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