How accurate is the Smith Model 610 10mm,.40 smith and 10mm Magnum after being machined to 10mm Magnum length?

Has anyone tested a Model 610 for accuracy after being machined to accept a 10mm Magnum cartridge.

10mm magnum?

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Yep, it's a real thing. Starline makes brass for it.

The 10MM Magnum was designed as an auto loading cartridge for the AutoMag IV about 25 years ago
It makes a wonderful revolver cartridge in the 310/610 family of firearms.
All that is required is that the cylinder chambers be lengthened. Then the revolver will fire 10MM Magnum, 10MM Auto or 40S&W. You can even put all three in the same moon clip if you like.

Did you notice any difference in accuracy after the conversion?

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None whatsoever.

Wowsers, after seeing the price of a 610, I would be really concerned about machine it. I am intrigued by the cartridge especially in a revolver package. Hopefully Smith will make them again????

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I have to wonder why in a revolver why anyone would want to alter a 610 to in effect end up with a 41 magnum? I just don't get it. Seems like reinventing the wheel almost.

610 punched to 10mm MAG???

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So many S&W's, so few funds!!

If nobody ever did things like that we would have never had a lot of the rounds we have available today. Possibly he wanted 41 mag power with the ability to use moon clips and be able to fire several other commercially available less powerful rounds. Something not available with the 41 mag.

I shoot easy shooting .41 spl loads in my M57 power factor is about 160 or roughly like a 38 spl +P , All the way up to Hot .41 mag loads. Even a hot 10mm magnum is not equal to .41 mag . I have a M610 as well wouldn't machine it just because of the value, they are hot right now !

I see various 10mm loads, 40 S&W loads, on shelves, never saw a 41 special load in a store and for that matter seldom see very many 41 mag loads.

If someone has the ability and wants something a bit different I say go for it. Yes on some you might hurt the resale value, but if it was only about money I would never shot any of them. Even reloading you can easily out spend value even without wear factor. Just boughta 25_5 that . Is going under the knife.

You have never seen .41 spl in a store because they don't exist in factory loadings - it's a wildcat cartridge . Starline makes brass

Question for colt saa:

Have you seen any L frame Model 646s reamed to 10 MM Mag? David Clements and other gunsmiths have converted 686s and 586s to 6 shot 10 MMs and it has been posted that Model 646 titanium cylinders should be a little stronger than steel cylinders so if you can reliably load the longer brass to not exceed regular 10 MM pressure then I do not think cylinder strength would be a problem. An L frame 10 MM Mag would not be as fat as your Model 310 and would probably recoil less.

I have not seen or heard of anyone doing it, theoretically there is no reason why that would not work. Pressures are not an issue for the 646

Size wise, you would be right in the same area as the 5 shot Taurus big bore snubs from 15+ years ago but with a longer 4" barrel.

The Taurus snubs were available in 44 Special, 41 Magnum, 45ACP, 45 Long Colt as well as a 7 shot 357 Magnum as far as I can recall. Barrel length was 2" or 2 1/2" depending on the cartridge and they were manufactured in carbon steel, stainless steel, Total Titanium and alloy(44SPL and 45ACP only)
The stainless snubs weighed in at roughly 29 ounces while the Total Titanium versions were 19 ounces and under

I have been known to pocket carry the 45 Long Colt, model 450T shown in the above two photos from time to time. Mostly for dramatic effect

I think the Taurus snubs were a decade ahead of their time, as was the 646. The fad back in those days was for plastic pistols. Concealed Carry had not yet evolved to the widespread phenomena of recent times.

As a defensive carry revolver, I have no objection to my 310, 327 or 357 night guards. As a fun, day at the range gun or plinker, that is a different story.

That is why I have the 3" and 5" model 610 revolvers. The big N-frames can be shot all day without much fatigue from heavy recoil

Saw a 610 identical to the 5 inch posted above in a gunstore last week.....$1,600 yikes.

Very. I have shot several deer with the 10 mag from my 610. In answer to why bore it out? I had 10mm first, then .40 S&W, and intended to buy my friend's 10mm Magnum Automag IV and liked the versatility of being able to shoot all three from the same gun so I had the brass. Unfortunately he died before I could buy the Automag from him.

The gun can easily handle the loads, and it is extremely accurate.

Sorry to bring up an old post.
With S&W making the m610 again in 4 & 6.5”, I’m interested in getting the
4” version. Doubletap makes 10mm Magnum now and would be a great outdoor cartridge. Can S&W convert this revolver for me to shoot both 10mm auto and Magnum? If not, where is a good place to send the revolver?

Thx

No, Smith and Wesson will not do that kind of work

Any of the re chambering that I did not do myself I sent over to Mark at Pinnacle

All he will need as the cylinder

Great thx! I’ll call Mark about this. I’m anxious to get this project started.

I just bought (500) 10mm Mag cases from Starline & I already have a Manson finishing reamer from when I converted my 4013 to 10mm, so I think I'll take the plunge. I plan on calling Manson next week to see if they have/can make some Go-No Go gages for the 10mm Mag too.

Also on the look-out for more reloading data on the 10mm Mag as well.

Just seems like a fun & unique project to do, even if it's not necessarily anything more than I have already. Guess that's the fun & unique part.

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