Question on 10mm - MP-Pistol Forum

Question on 10mm

This is a discussion on Question on 10mm within the MP Gunsmithing forums, part of the Smith & Wesson MP Forum category; Groo here Has anyone religned a 45 barrel or had a custom 10 mm barrel made for a FS m&p 45 ? Will the 45 ...


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Old December 7th, 2015, 08:35 AM   #1
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Question on 10mm

Groo here
Has anyone religned a 45 barrel or had a custom 10 mm barrel made for
a FS m&p 45 ?
Will the 45 mags hold/feed 10mm?
As some convert glock 45s to 10mm , I was wondering.
{they even use 45 mags to feed it}
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Old December 7th, 2015, 09:11 AM   #2
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Old December 29th, 2015, 03:15 PM   #3
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Not sure why you'd want to do this. The slide is almost certainly not beefy enough to handle full (normal) power 10mm regularly without getting beaten up. The extractor and ejector would need to be modified and probably some other things. Theoretically you could drop the barrel in there and see what happens but good luck.

Wouldn't want to bet on the resulting reliability either.
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Old December 29th, 2015, 05:08 PM   #4
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I am sure if one of the top Custom shops wanted to do this, it could happen but the liability would be too high for the shop owners already paying too much for insurance now. When I was at Wilsons years ago a little squirrel told me that the Liability insurance was 5 thousand plus a month.

Can you imagine a shop owner blowing up a gun and killing or maiming someone? Your idea is likely gonna need to come from the factory and besides, 10 mm not very popular especially with the FBI and others going back to Nines.
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Old December 29th, 2015, 05:41 PM   #5
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I believe the conversion would be much easier using an .40S&W (10mm short) pistol than a .45acp pistol, based on the extractor, ejector and case head diameter "stuff" being the same as a 10mm.
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Old December 29th, 2015, 08:34 PM   #6
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For the amount you would need to spend to convert a .40 or .45 to 10mm, you would be better off just buying a Glock 20 or Sig 220 in 10mm. Dan Wesson also makes 1911 style 10 mm pistols that are good quality and reasonably priced.
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Old December 30th, 2015, 05:25 AM   #7
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Question on 10mm

"reasonably priced" he said...
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Old December 30th, 2015, 08:07 AM   #8
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when your dealing with a 10mm there are many variables and these are dependent on what you hope to accomplish with it. The normal gain in fps(same gr. bullet) over a .40 S&W in both stock ammo is approx. 200 fps. This can be upped with the 10mm by choosing the right gun (S&W Gen. 3's) such as the 1006 /1076. These are STEEL framed and beefy. The stock spring has to be changed out from a 17# to a 22# and fresh cases can be maxed out with powders such as 800x ( read up on this as I will not divulge due to liability) and case is used only once. Velocities can be achieved in the .41 magnum range.
The Glock .45 and 10mm frames accept each others barrels however, I recommend using aftermarket barrels from the likes of Lone Wolf or Storm Lake,but do not recommend hot rodding these frames.
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Old December 30th, 2015, 03:48 PM   #9
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Quote:
Originally Posted by Rick M View Post
I believe the conversion would be much easier using an .40S&W (10mm short) pistol than a .45acp pistol
Actually, it wouldn't work with an M&P40 at all. Any magazine that fits a 10mm cartridge won't fit into the M&P40's grip.

In my earlier days of reloading for the M&P40... we loaded up some 180 gr. solid copper bullets over Longshot in a trimmed 10mm case. With some throat tuning we were able to achieve average velocities just over 1200 fps before pressure sign, which is 170 fps faster than 10mm Federal of the same weight. We used an extra power striker spring for the harder primers, plus a 24 lb. Wolff recoil spring to help tame the recoil and minimize frame battering. We launched some 155 gr TMJ pills at over 1400 fps before pressure sign (unpleasant shooting), but at those speeds the copper starts to peel away from the lead.
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Old December 31st, 2015, 05:17 PM   #10
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Originally Posted by KRWeiss View Post
Actually, it wouldn't work with an M&P40 at all. Any magazine that fits a 10mm cartridge won't fit into the M&P40's grip.

In my earlier days of reloading for the M&P40... we loaded up some 180 gr. solid copper bullets over Longshot in a trimmed 10mm case. With some throat tuning we were able to achieve average velocities just over 1200 fps before pressure sign, which is 170 fps faster than 10mm Federal of the same weight. We used an extra power striker spring for the harder primers, plus a 24 lb. Wolff recoil spring to help tame the recoil and minimize frame battering. We launched some 155 gr TMJ pills at over 1400 fps before pressure sign (unpleasant shooting), but at those speeds the copper starts to peel away from the lead.
Didn't think of that (by preference I don't own any .40's).

I'm still working from a multi-decades long 1911 frame of reference, and am not used to stumpy fore and aft grip frame dimensions.
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Old December 31st, 2015, 06:14 PM   #11
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It may be practical to get a 10MM EAA pistol and be done with it... Practical being the key word.

EB
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Old January 3rd, 2016, 06:01 PM   #12
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I'd like to have a 10mm M&P, but unless some government agency puts in a BIG order that justifies the cost of retooling and development, it will almost certainly never happen.

I have my sights set on a Sig P220 in 10mm, if I ever find one in the configuration I like.
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Old January 3rd, 2016, 07:02 PM   #13
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10MM M&P? Yeah, would be AWESOME!

Until then:
Semi Automatic Handguns for Sale | Handguns for Sale | Grab A Gun Online Gun Store

See: EAA for less than $5!
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Old January 4th, 2016, 10:52 AM   #14
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I have my sights set on a Sig P220 in 10mm, if I ever find one in the configuration I like.

Pretty much where I'm at. And if there's a caliber that pushes me into reloading, it would be 10mm.
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Old January 4th, 2016, 11:27 AM   #15
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Pretty much where I'm at. And if there's a caliber that pushes me into reloading, it would be 10mm.
Yup, quick break-even. But once fired brass is pricey IME.
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