10mm vs .40 s&w

B

Buckeroooo

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I'm new to handguns and am wondering if there is a differnece between the 10mm and the .40 cal s&w. Are they the same thing and are they interchangable?
 
Not the same thing and not interchangeable. The 10mm is a longer cartridge and is also loaded to much higher pressures... much bigger bang than a .40

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10mm in the middle, .40 on the right.
 
I would like a 10mm but the factory ammo for it is all "fairy loads" no manufacturer loads it up to its potential that it was intended to do. And I don't reload. Plus its pricey too boot.
 
10mm is my favourite calibre. With good reason. I have always found the .40 S&W to be....boring. Along with 9mm it's purely a practice cartridge for me.

Seriously though 10mm Auto, an incredible cartridge.
 
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10mm uses a large pistol primer and .40 uses a small so interchanging brass is not possible. 40 uses bullet weight from 155 gr up to 180 gr and you can go to 220 gr (i think) on a 10mm.
 
I, too, have a 20 and a 29... 10MM is also my favorite caliber. It is, when handloaded to its full potential, a very hard-hitting round, particularly for an autoloader :D Lots of fun!! :cheers: The only thing I have that is more powerful is my .45Super.

.40, by comparison, is positively anemic - I got rid of my one and only .40 1911, if that tells you anything

Mercury0_0 said:
The 10mm rocks. I bought a G20C along with a .40cal conversion barrel so I've got the best of both worlds. Factory 10mm is weak, but I reload so I made up some real firebreathing, rip snorting rounds and THAT is some fun shootin'. I also bought a G29 and I bought a .40cal conversion barrel for it too. Fantastic.
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10mm is the parent case for the 40 Short & Weak...

I also have a G20 & G29 in 10mm as well as replacement barrels in 40S&W for both for practice or CCW with the G29 when I am in the States and a 5" barrel for the G20 when I was allowed my G20 onto my ATC.
 
10mm

B said:
10mm is my favourite calibre. With good reason. I have always found the .40 S&W to be....boring. Along with 9mm it's purely a practice cartridge for me.

Seriously though 10mm Auto, an incredible cartridge.
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+1

Due to the relative expense and scarcity of 10mm brass around these parts I had Gunnar at Armco fix me up a drop-in barrel in .40 S&W so I can keep my Colt Delta's plinking away with my own reloads from the plentiful source of .40 S&W brass we have around here...

Wouldn't mind adding a S&W 610 wheelgun to the mix, too.............. :cool:

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NAA.
 
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I've got a Glock 29, put 200+ rounds of fairly hot but commercially purchsed reloads thru it the first day. Made all the joints in my shootin hand ache for 3 days. But love it to death. I've shot lots of 40's but the 10mm pushes more lead at way faster muzle velocity. Look up the specs on the loading forum. That baby pushes the edge of the envelope envelope of contollability, but with practice it can be done. Mind you mine is a sub-compact so I just limit myself to 100 rounds a session now. 40's are cheaper to shoot and are more than capable for sure, but I like the big bang units, and short of 44mag this is the baby.
 
Buckeroooo said:
I'm new to handguns and am wondering if there is a differnece between the 10mm and the .40 cal s&w. Are they the same thing and are they interchangable?
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Bullets are the same caliber and used in both rounds until you get past the 200 grain mark. Interchangeable in revolvers, yes; not interchangeable in semiautos unless you swap out barrels.

After long and extensive scientific investigation, it has been determined that at ranges approved for restricted firearms, the .40 S&W makes identically sized holes in targets with approximately the same ease as the 10mm.

For those shooters who insist on spending more money to make those holes, the 10mm offers a significant advantage. For those who want to feel more recoil - but not quite the manly man recoil of any S&W revolver from the .44 Magnum on up - it also offers a significant advantage over the .40 S&W.

An attempt has been made to poll bad guys about the condescending "short and weak" reference to the .40 S&W (invariably by those not belonging to any police force which actually carries the .40 S&W). Unfortunately, not enough survivors of police shootings could be found to give the study statistical relevance. Incidentally, the .40 S&W produces pretty much the same ballistics with a 135 grain bullet as the .357 Magnum with 125 grain bullets does - the so called "King of the Streets" load.

The 10mm will run a 200 grain WFN about 200 fps faster than the 1100 fps the same bullet will make out of the 40 S&W - about an 18% gain - so it is certainly a potentially preferable choice for those who have an ATC for protection against bears. On the other hand, if you do have an ATC and bears are uppermost in your mind, the 10mm as well as the 40 S&W is well behind on the power curve and much more powerful rounds are available

Both are excellent rounds. You just need to figure out what you want to suit your needs.
 
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