Which 10mm?

M&P all the way.

Mine is great, carry it in Alaska couple times a week. Shoots everything accurately, reliably, and softly.

I voted G20. Mine is SF and has a variety of upgrades. Most notably, Taran Tactical stippling for an awesome grip. Frankly, I can't tell the difference between stock and the full ZEV kit (trigger and slide parts).
I also have 357 Sig and 6" ported 10mm lone wolf barrels which makes it more interesting. Totally reliable with a various 10mm and 357 sig loads I have run through it.

I'm sure there's more to the stories than we're told, but the G29 has had some serious failures with high power loads. Don't take my word, Google it. I love my G20, still going to get a G40, but I'll avoid the G29.

If I'm up the country and need to pack a 10 in the woods, I don't care about portability. It's going OWB and on a belt. For this reason I never saw much merit in a 10mm smaller than a full sized gun.
9mms for CCW, different story altogether.

Sig P220 or Smith 1006

As always, my vote is for an SVI/Infinity Double Stack.

Hugger-4641 said:

I love my G20, still going to get a G40, but I'll avoid the G29.

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I have a G20 and a G29. Both shoot good. The 29 isn't as bad as I was led to believe (heavy recoil, inaccuracy). I don't know what google has to add.
You cannot shoot spicy 10mm out of Glock pistols. This is why I would grab my XD 10mm pistols before Glocks.

I want to buy a G40 just to add one to my collection.

Zahn said:

Sig P220 or Smith 1006

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I have 2 P220 Sigs but a 1076. I want a 1006!!

What am I doing wrong, a double picture and a thumbnail!!

Alright, I'm tossing my vote in for the G20. Well balanced and a good record of performance.

tommy.duncan said:

I have a G20 and a G29. Both shoot good. The 29 isn't as bad as I was led to believe (heavy recoil, inaccuracy). I don't know what google has to add.You cannot shoot spicy 10mm out of Glock pistols. This is why I would grab my XD 10mm pistols before Glocks.

I want to buy a G40 just to add one to my collection.

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I've shot underwood out of my 20 and 40 with no problems and they are pretty much full house 10mm. You can also get a fully supported barrel from lone wolf.

JB111 said:

I've shot underwood out of my 20 and 40 with no problems and they are pretty much full house 10mm.

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I buy underwood as often as I can, but underwood is not real 10mm. If you look at old Norma specs and hot hand loads you will see smiley cases,
Glocks give 40S&W cases smileys!!

tommy.duncan said:

I buy underwood as often as I can, but underwood is not real 10mm. If you look at old Norma specs and hot hand loads you will see smiley cases,
Glocks give 40S&W cases smileys!!

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Which generation are your Glocks?

tommy.duncan said:

I buy underwood as often as I can, but underwood is not real 10mm. If you look at old Norma specs and hot hand loads you will see smiley cases,
Glocks give 40S&W cases smileys!!

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From what I can find during an admittedly quick google search, norma produced a couple of different loads, the most common being a 200gr. projectile listed at 1200fps which would put it at about 639 foot pounds of energy. Some of the stuff underwood puts out is stronger than that, some of it over 700.

I found this article which I found to be interesting about how Norma developed the 10mm and it states that the original test load was a 200gr projectile that traveled at 1260 fps from a 5 inch barrel which produced 704 foot pounds of energy. That puts it right in line with some of underwoods offerings of today.

https://rangehot.com/original-10mm-...ested velocity was said,for a 10 shot average.

Edit: I meant to add, the underwood ammo I currently have is 180gr. xtp, which is rated at 1300fps and 676 foot pounds and is fairly stout round and Ive never had a failure, ruptured cases or any such thing. The cases do bulge, but thats a glock barrel thing, and if it was a worry I could drop in a fully supported barrel but its never bothered me. I probably would not shoot an over spec hand load out of my glock 20 or 40, but honestly I would not knowingly shoot over spec rounds out of any of my guns. Ive seen guns explode in peoples hands and I dont like the results.

WrongHanded said:

Which generation are your Glocks?

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Gen 3

JB111 said:

From what I can find during an admittedly quick google search, norma produced a couple of different loads, the most common being a 200gr. projectile listed at 1200fps which would put it at about 639 foot pounds of energy. Some of the stuff underwood puts out is stronger than that, some of it over 700.

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You are correct. I usually don't shoot the older stuff I have anymore. I have shot lots of the newer weaker 10mm ammo.
I have shot lots of the Underwood and Buffalo Bore too. Both are spicy.

JB111 said:

I probably would not shoot an over spec hand load out of my glock 20 or 40, but honestly I would not knowingly shoot over spec rounds out of any of my guns. Ive seen guns explode in peoples hands and I dont like the results.

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I never shoot over spec reloads, I will load to max levels to shoot out of specific pistols. They are marked MAX so I don't shoot these in pistols with unsupported barrels.

tommy.duncan said:

I buy underwood as often as I can, but underwood is not real 10mm. If you look at old Norma specs and hot hand loads you will see smiley cases,
Glocks give 40S&W cases smileys!!

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From what I've read the Norma specs were 1200 fps w/ a 200gr bullet from a 5 inch Delta Elite. Underwood specs their 200gr stuff at 1250, but no mention of barrel length.
I've gotten Berry's 200gr from the Glock 40 averaged at 1125 with an 8.8gr charge of Blue Dot. Max charge in the Lyman manual is 9.6, so 1200 fps is definitely achievable in a 5 in barrel.

You must be about 20 years behind the curve, Gen 4 Glocks and later don't have the awful chamber support the earlier gens do, even Gen 3 I think supports the cases better.

TTv2 said:

You must be about 20 years behind the curve, Gen 4 Glocks and later don't have the awful chamber support the earlier gens do, even Gen 3 I think supports the cases better.

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If my Gen 4 G20 is any example, the chamber support is better, but still not fully supported.
I just reloaded some Blazer brass that I fired new in my G20 and it still had enough bulge that it wouldn't plunk in my case gauge. It re-chambered fine in my G20, but I had to run it thru my bulge buster to get it to chamber in my RIA 1911.

WisBorn said:

You guys are making me nervous about unsupported barrels
I don't want the gun to blow up in my hand???

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Unsupported chamber doesn't necessarily equal gun blowing up unless you are using max or above max level loads. Unsupported chamber does mean more reliability in dirty conditions, which can be desirable. But this also means more stress on brass, which is bad if you reload. The G20 and G40 will stand up fine to any factory ammo you can buy. The G29 however seems to have a weaker frame and has had some failures with high power loads, so that's why I wouldn't buy one.
If I decide I want to use max power loads or cast bullets in my G20, all I have to do is buy a KKM barrel and maybe a stronger spring.

WisBorn said:

You guys are making me nervous about unsupported barrels
I don't want the gun to blow up in my hand???

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If it's any consolation to you I run the factory barrels in my Glock 20 and 40 and have never had a problem. I've shot an assortment of factory and boutique ammo through mine without issue including stuff from underwood and buffalo bore. It's more of a problem for reloaders because the brass swells out and takes more work before it can be reloaded.

If you are worried about it or if you reload you can buy a barrel from lone wolf which is fully supported.

WisBorn said:

You guys are making me nervous about unsupported barrels
I don't want the gun to blow up in my hand???

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So let's say you buy a gen 4 G20, because you're a smart man and you understand it's a solid and reliable option with a good balance of attributes across the board:

You don't reload, so you don't need to worry if the brass bulges. It will only do so with hot loads, and I doubt you'll be shooting too many of those because if you're buying from Underwood, Double Tap or Buffalo Bore, they're going to be expensive. Brass bulging due to a chamber not being fully supported, does not mean brass failure.

But let's say you're still concerned. Here's a KKM barrel vs my stock gen 4 barrel. (Ammo is Federal HST and has small primers for whatever reason)


Not enough to talk about really. Although the KKM chamber is tighter, which is part of the difference between "match grade" and "still-functions-after-a-mud-bath grade".

WrongHanded is correct above. For those of us that like to push the 10MM limit, an aftermarket barrel makes sense. For the average shooter, no need to worry.

I've shot 10mm since the late 90s. I have most. The only ones I've had blow up were 1911s. Lol. Am older delta with a cracked frame and a newer one that had 2 cases blow out (no damage to the gun though) If I could only have one it would be a Glock 20. Ive fired 10s of Thousands of rounds from .40 up to 1250 FPs 200 GR loads in gen 3 and up Glock 20s and never had an issue other than a mag catch that finally gave up a couple year ago. 7 bucks for a new oem catch and spring and I'm still hunting with it. Its by far the most tested 10mm and the only one successfully fielded by any agencies with any success that im aware of.. Its a tough gun. I'm well over 6 foot and can palm a basketball but even I'll say the grip is a bit fat. So small hands beware. I love the Beretta 92/96 and sig 226 grips and they are often called fat. Just for an idea of size.

The 220 may be my favorite 10mm, but between it and the 1911s they are heavy and only a round it two over a 686. and just wouldn't be my choice if I could only have one 10mm. I do love the delta and 220 though.

One I don't have is the 320 in 10mm. I will someday maybe.

Financially though I guess my D&D would be the one I'd keep. As far as shooting though, it's the worst. I'm simply afraid to enjoy it very much. Lol.

Of all mine, my least favorite would be the 29. Just worst of every world to me. Too big for ccw. 20 is better for owb or duty. Etc etc. Maybe the least favorite handgun I own.

That said If I could only have one handgun period. As in only one 1 altogether and not just "only one 10mm" ...it would likely be the 29. Big for ccw but small enough.... Powerful enough for bear and whitetail but not too powerful for a decent followup. Can shoot 40 or 10mm..... can have 10 or 15 rds. Or 30 if you choose.

G40 MOS is what I carry into the woods when hunting, it soaks up high octane loads great. Very fun and accurate shooter. I put a Alphawolf threaded barrel in it for increased case support.

The way I see it is....if youre a handloader, the 10mm is probably your favorite semi auto cartridge due to versatility. I know it is mine....
It's a straight walled case and easy to load.
It can be loaded with light 155gr bullets to near as slow as 1000 fps for excellent target loads. The SWC cast bullets run great in my G20 and G40 with Lone/Alpha Wolf barrels and are very economical to shoot. It's an extremely accurate cartridge when loaded light and fired from the large framed, longer barreled gun like my G40 MOS
Spice things up and get a 180gr bullet over 1,400fps safely out of a handgun and without pushing pressure limits.
You can match the power factor and/or Muzzle energy loads, with the similar weight bullets of a heavy 9mm, 40S&W, 45ACP and 357 Magnum throughout the 10mm spectrum....
All with great accuracy and within just about any published load out there.

If I wasn't a handloader, I would be paying a lot of money for the Spicier hunting loads (what are they now a buck or 1.50 a shot), and downloaded target/plinking loads are basically non-existent on the factory market. The "regular" 10mm factory loads out there are running 180s about 1,200-1,250, which is no slouch, but I'd be seriously questioning whether I "needed" the cartridge for 45+p or hot 40 s&w performance (plus a narrow margin more)