Can S&W 610s be reamed out to accommodate 10mm Magnums?

[Outrider]

Folks,

A YouTube gunner posted a video where he'd sent off his Ruger GP 100 Match Champion 10mm to have it reamed out for 10mm Magnums.

Can it be done with S&W 610s? If so, what would you expect to pay?

Having a 610 that could shoot .40 S&W, 10mm standard AND 10mm Magnum would be a VERY attractive package!

10mm Mag is bumping its head -- pretty handily -- against .41 Mag ballistics!

Any suggestions on who could do it?

As always, much appreciated! -- John

 

[murphydog]

Yes, I believe member colt_saa (among others) have done it.

Its 6-10 so, show your 610s

 

[steelslaver]

Should work at least up to about the same bullet weights and velocities as a 41 mag as the brass has a heavier constructed base and the cylinder walls would be slightly thicker as the 10mag as a .425 base and the 41 mag is .434

 

[tlawler]

It can absolutely be done. I’ve reamed a Ruger SRH, mainly because I didn’t want to modify my 610 No Dash. Since then, I’ve been on the hunt for a -1 or a -2 to ream. I found another No Dash that had been drilled and tapped for a scope mount instead, at a very attractive price. Since it had already been modified, I feel much better reaming it. Plus it’s already set up for a scope. I haven’t done it yet, but it’s definitely on my to do list!

I think Hamilton Bowen still does it, but it’s not that hard to DIY, as several members have taken on the task. Quick turnaround and the feeling of accomplishment of doing it are great motivators.

Here’s my thread on doing the SRH:

My latest project

 

[BLUEDOT37]

I reamed my 610-3 to 10MAG several years ago using a standard 10AUTO finishing reamer from Manson & I've put well over 500 rounds of handloads (probably closer to 1000) thru it, using (7) different powders.

But I've since come of the opinion that the 41MAG is a better revolver cartridge than the 10MAG is in a revolver.

It's not because the 10MAG is rimless or that it holds 5.9% less powder than the 41MAG.

It's because all jacketed common commercial .40/10mm bullets are made without cannelures, as you'd expect for an auto bullet.

Without that cannelure heavy magnum loads are subject to jump crimp. Also, when loaded with slow powders you don't get as good of a burn with only a taper crimp.

And don't forget there's virtually no commercially published reload data out there for the 10MAG so you're on your own.

10mm pistols out-perform 10mm revolvers, all things being as equal as possible.

From my 10AUTO 5" M1006 (actual rifled bbl is 3.98") I can get about 1433mv with a 165gr JHP while the 4" M610 10MAG (actually 3.88" bbl.) gets about 1469mv with the same bullet.

Can you say barrel-cylinder gap loss ten times.

The 10MAG would obviously benefit from the 6-1/2" bbl. model.

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610 10MAG at the range
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