10mm or 40

[tipoc]

Peter Eick's points in post #73 are on point I believe.

The 40 S&W is one of the better self defense rounds in it's various loads available today. It's chambered in some very good guns and if a person can shoot those guns well in .40 S&W then it's a good choice for self defense.

It's my opinion that this round is at it's best in the 155-165 gr. loads. A minority opinion as most seem to favor a 180 gr. load at a slower speed closer to that of the 44 Spl.

The 10mm is by any common measurement a more powerful round. With some loads from the 40 you can come close to some loads of the 10mm but it involves contortions and extreme pressures. Why go to all that, especially when it can be done from the 10mm without breaking a sweat?

The 10mm can be both an excellent self defense round and a good hunting round for hogs, black bear, deer of all sizes and even elk with a good shot at a proper distance.

An examination of reloading manuals, Fowler's "Ammo and Ballistics", "Ammo Encyclopedia" by Allen and Bussard or other sources shows this.

tipoc

 

[WinThePennant]

I had the very same question about six months ago.

My solution?

Buy a Glock 29. It's a 10mm, which I LOVE. Throw in a Lone Wolf drop in barrel, and boom, you have a .40 cal. Actually, I also bought the .357 Sig drop in barrel. Just use the same 10mm mags. Awesome. Can't believe how great the G29 is.

Love that G29. Best Glock pistol made, IMHO. Everyone should have a G29.

 

[Elkins45]

I'm a huge fan of the 10mm cartridge and have been known to occasionally carry a S&W 1006 under a heavy winter sweatshirt. I do realize that I'm not the norm.

A 10mm is a 45 sized handgun where a 40 is a 9mm sized handgun. Can you conceal a 45 sized handgun? Is there a 10mm gun currently on the market that you like, can afford and can actually acquire from a retailer? If not, are you comfortable with an out of production used gun? Do you have access to affordable 10mm practice and defensive ammo?

Lots of questions only you can answer.

 

[Saleen322]

MachIVshooter wrote: ....but until you account for bullet encroachment, you're not there....

I get numbers similar to what you came up with. The 40 S&W case I measured was a Federal (bottom) and it has less volume so I will use the 0.687" as that helps the 40 and use the stated 0.807" for the 10mm (top). If you take a 200 grain bullet like the one in the picture, it will take 0.431" of the case to seat in. That means 0.256" in the 40 for powder compared to 0.376" in the 10mm or a difference of 0.120" or about 47% (46.875%) more powder space in the 10mm compared to the 40. This pic with the two cases, the bullet and loaded 10mm illustrates this. Just eyeballing it you can see the 10mm has about twice the space for powder below the bullet. Add to that the 10mm has a SAAMI MAP of 37.5K psi compared to SAAMI MAP 35K for the 40 means the 10 also has the pressure advantage.



The 40 is an option if you want something a little bigger than a 9mm without giving up too much capacity. The 10mm is more powerful and the heavier the bullet, the more advantage it has over any 40.

 

[NITRON]

If you can handle recoil get a 10mm,me myself I would check out a SIG,OR A DELTA ELITE
I know GLOCK MAKES A 10MM IT'S A MODEL 20 I think the gunny carry's one R.L.ARMEY
I would do a little research if there's a shooting range where you rent one. You might try
H&K!!

 

[NITRON]

10mm presure

Remember that's what screwed the ''BREN 10'' well that and bad metallurgy
I'm really not sure the RC ? hardness on something that's going to take that
kind of abuse, You can go over maybe something in a 475 WILDY!! They
also make a 45AUTO MAG. And AMT use to make a 10mm AUTO MAG!!!

 

[Nom de Forum]

Remember that's what screwed the ''BREN 10'' well that and bad metallurgy

Was it that or was it bad management and magazine availability?

 

[GLOOB]

People confuse pressure and momentum all the time. The Bren Ten frame cracked from the battering it received due to momentum. When pressure kills a gun, either the casehead or the locking lugs or the chamber is what gives out. If pressure determined anything, 9mm's would have to be build stronger than 45ACP handguns, and 40SW's too, for that matter.

 

[ApacheCoTodd]

Remember that's what screwed the ''BREN 10'' ...

Nah - it wasn't that at all. It was Italian loafers, pastel jackets and men's hair products in particular and Miami Vice in general that did it in.

 

[agtman]

Originally Posted by NITRON
Remember that's what screwed the ''BREN 10'' ...

Nah - it wasn't that at all. It was Italian loafers, pastel jackets and men's hair products in particular and Miami Vice in general that did it in.

Someone rang ... ?

 

[Kynoch]

In ballistic gel tests, there doesn't seem to be much difference between service calibers (9mm, .40, .45, even 10mm). All pistol rounds are pretty ineffective as far as stopping a threat, though if penetration is what you need (such as if you're in the woods with bears around) 10mm might be a good choice for maximum penetration, but even then I'd rather have a .44 Mag or .454.

For self defense against 2-legged critters, there's no significant advantage to 10mm over .40. There's no doubt 10mm is faster with more muzzle energy, but in my opinion, the recoil increase offsets that very slight advantage.

Any reliably expanding, 12-to-18-inch-penetrating caliber is gonna be similar in performance.

FUD.

 

[bangswitch]

ApacheCoTodd--Nah, it was Italian loafers, pastel jackets......and Miami Vice in general that did it in.

Someone rang ... ?

Too bad the G20 wasn't released until four years after Miami Vice ended. Sonny coulda carried a Glock instead. This rig is mine, I bought my G20 the week they were released in 1993; I was a big MV fan, so I had to have the Galco holster that Sonny carried.

 

[agtman]

Yes, you're right.

But actually, the more or less "period correct" (i.e., mid-to-late '80s) 10mm autoloader for Crockett after the Bren Ten would have been S&W's 5" handcannon, the 1006.

After 2 seasons with the BT, for all but the last year of the series he carried Smith's 645. The last year of the show, 1987, Crockett was "upgraded" to the 4506.

The G20 didn't hit the scene in its 1st Gen itineration until like, 1989 or 1990, IIRC.

Old-School Cool ...

 

[ApacheCoTodd]

Yes, you're right.

But actually, the more or less "period correct" (i.e., mid-to-late '80s) 10mm autoloader for Crockett after the Bren Ten would have been S&W's 5" handcannon, the 1006.

Sure, you're correct but that's not the "real" gun of MV. Lots of us tend to ignore it like we do the faux Testarossa snuck in there after the faux Daytona was turfed off for fashion's sake.

Besides - what tool ruins perfectly good Panteras to fake-up a doofus' car of a Testarossa.

I always wondered if Sonny had to carry 10s to comp for his partner's 2 round shotguns and nancy-boy .38?

 

[bangswitch]

The G20 didn't hit the scene in its 1st Gen itineration until like, 1989 or 1990, IIRC.

I thought I'd purchased mine around 1993, but I looked back through some pictures I had made, and I got mine in Fall of 1991, which coincided with the G20's initial release earlier that year.

Although it is the first iteration of the 10mm in a Glock pistol, the original G20 is a 2nd generation gun, having features not on the original G17, such as front strap checkering and back strap serrations for better grip. There were internal mods made in 1991 also. 3rd gen Glocks came out in the late '90s and they include a rail mount on the underside of the frame, forward of the trigger guard. 4th Gen models came out in 2010. Glock didn't actually separate their pistols into "generations", officially, until the Gen 4 guns.