1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Whats the difference between 10mm and a 40

Discussion in 'Handguns: Autoloaders' started by Scotty 2 Hotty, Apr 3, 2009.

  1. I am looking into buying a good dependable pistol for multi purposes. I am leaning toward a glock, and could be happy with any caliber, but mainly would want it to be either 45 acp, 10mm, or 40. I dont really need it for conceal and carry, I have that covered. I already have a 1911 45 that I love to shoot. I just never understood the difference in the 10mm and the 40. Several years ago, the 10mm was common for law inforcement, now they all carry the 40. I have always been partial to the 45, but am taking suggestions on the other calibers due to ammo capacity. HELP! Any advice out there? So far my top choices are a Glock 21 45 acp or a Glock 35 40 or a Glock 20 10mm. What about the springfield XD 45? Is that a good gun?

    Thanks for al your input!:D
  2. Lone_Gunman

    Lone_Gunman Well-Known Member

    10mm and 40 S&W shoot the same bullets. 10mm case length is longer, so it holds more powder, and can be driven to faster velocities. It is a good cartridge, but for self defense, probably no better overall than other popular choices.
  3. CWL

    CWL Well-Known Member

    10mm came first as a result of FBI wanting a more powerful semiautomatic round capable of stopping BGs. They were looking for a replacement for 9mm and .38 spl. (look-up FBI Miami shootout).

    10mm is great, problem is that it is just "too much gun" for some, particularly women. So they started using less propellant in the cartridge, this became the "10mm-lite".

    If 10mm cartridges were going to be loaded lighter, there was no-longer need to use such a long cartridge -and S&W cut-down the brass and created the .40 S&W. This soon became the standard for law enforcement agencies. Ammo and handguns are cheaper because less materials (not as beefy design) is needed.

    If you just want something to 'plink' with, .40S&W is going to be a lot cheaper to use.

    Personally, I prefer .45ACP, but you may want to have some variety.
  4. ahpd1992

    ahpd1992 Well-Known Member

    The springfieled is a well made gun, many of my fellow officers carry one and none have any complaints. LE guns get used and abused, the XD's have held up well.

    The 10mm was the wonder cartridge in the late 80's early 90's, but practical considerations for "smaller statured" FBI agents that couldnt handle the recoil forced the gun guru's at the FBI to load down the 10mm. The FBI light loads pushed a 180grain bullet at approx 900fps which still outperformed 9mm loads, but fell far short of what the full power 10mm loads produced.

    Smith and Wesson in a brilliant marketing move took the 10mm, shortened the case and duplicated the ballistic performance of the FBI load 10mm. This shorter cased round would fit in a smaller 9mm sized gun and viola you have the new wonder round of the last two decades in law enforcement.

    I personally have absolutely no use for the 40 S&W, if you want power in a small package then get a 357sig.

    The 40 S&W is to the 10mm what the 380 auto is to the 9mm. Same sized bullet, but no where near the power.

    Its interesting to note the 45ACP, most notably the single action 1911 style guns are the new rage in law enforcement. More and more departments in my area (mine included) are "rediscovering" John Browning's most famous of handguns.

    As to your OP, you WILL NOT find a more versatile round than the 10mm. It can be had hard, heavy, and fast for hunting deer, hogs, and other medium sized game. Mid weighted like the Winchester 175gr silvertip which is a devastating stopper of all creatures two legged and four. There are a lot of loads for this round, and a lot of 10mm enthusiasts, just google 10mm and you'll find lots of information.

    It is also known for its flat shooting, accuracy. Go with the 10mm Glock G20, one gun lots of uses.

  5. When loading, you cannot use 10mm to "make" 40 S&W cases. They are of different internal dimensions, and the 10mm takes a lg pistol primer, whereas the .40 takes a sm pistol primer. You do use the same dies for both, though. FWIW, when comparing the two.
  6. conceal45

    conceal45 New Member

    If you buy the 10mm save a few bucks to up grade your hearing protection you will need it. All the above comments are valid, but you will notice a difference in how loud it is compared to the .40. The first time at my indoor range that I heard a 10mm I stopped to see what he was shooting in the lane next to me. That was also a complaint when used by law enforcement as they don't have the luxury hearing protection in the real world.
  7. PT1911

    PT1911 Well-Known Member

    similar to comparing a .38 to a 357 if the .38 was the .40 and the .357 was the 10mm
  8. mokin

    mokin Well-Known Member

    You can buy 200 grain bullets to load in a 10mm Auto but not the lighter bullets that people load in the .40 S&W.
  9. JWJacobVT

    JWJacobVT Well-Known Member

  10. JWJacobVT

    JWJacobVT Well-Known Member

    Oh Scotty try to find a good used S&W 1006 or 610.
  11. mokin

    mokin Well-Known Member

    What I meant was that for the last couple of months I've only been able to find 200 grain bullets for my 10. I prefer 165 and 180 grain bullets for plinking but it seems that those bullets as well as many other reloading components for more popular cartridges (such as the 40) are few and far between. At this time I am glad to have a pistol capable of such versitility.
  12. Thanks! I have narrowed it to Glock or Springfield 45 acp.

    Thanks for the input! I have learned alot from your experience. I am leaning toward getting a 45acp in either the Glock 21 , Glock 30 or a Springfield XD. Out of those which would you recommend? I know the Glock has a 5.5 lb trigger. What does Springfield have? Doing this I would only have to stock pile 45 ammo for 2 diffenet pistols. The other 45 I have is a LLama. I know that's not a highly respected name, but I have put around 1500 rds. thru it with not problems at all. I like to think of it as I just got one of the good ones. Thats the gun I keep in my truck under the seat if you know what I mean. The next pistol I buy, I want to be a little nicer. Dont have a big budget though, so I have narrowed it down to Glock or Springfield! I look forward to getting your input! :confused:
  13. JWJacobVT

    JWJacobVT Well-Known Member

    Scotty which fits your hand better?
    which one feels better when you shoot it. Try the S&W MP45, it fits my hand better than the glock or the xd, but that is my hand not yours. I hate to say it but if only the glock or xd get the glock. more after market stuff avalible. I still prefer my 10mm over my 45 balistically. Greater range of bullet weights and loads, flatter shooting, more "knock down" ie bullet weight times velocity. my 45 are now safe queens, I carry my 10mm on duty and ccw. but just my .02.
  14. basicblur

    basicblur Well-Known Member

    FWIW (and it’s worth what you’re paying for it!), here’s a few of my thoughts on the subject:
    Price/ammo availability-kinda knocks the 10mm out?
    (Over?) penetration-While LE may desire more penetration, as a civilian, do you really want/need the extra penetration of a 10mm?
    Glock vs XD-I’m an XD fan myself-Glock grip angle never worked for me, and there does seem to be an unusually high number of AD/ND with Glocks. I do like the grip safety on the XD-when holstering, conventional wisdom says place your thumb on the back of the slide to remove the web of your hand from the grip safety. This should give you an added margin of safety (as well as preventing slide movement) when holstering. There seem to be too many cases of Glocks discharging by folks who “can’t keep their finger off the trigger”? I’ve got a feeling some of ‘em (with light triggers) are hanging clothing etc when holstering?

    I’m assuming you’re a bit of a noob? If so, don’t make the mistake of getting a (super) light trigger for a SD gun! As one who grew up on DA revolvers, if you can’t shoot something simply because of it’s trigger pull weight, you need more range time.
    Sorry, but folks that have to have a range queen trigger to hit anything need to practice/learn to shoot!
    I’ve seen quite a number of folks drop their guns in the local gunsmith’s lap, wanting a “trigger job”. He usually tries it out, asks ‘em what they’re using it for (SD), then tells ‘em to leave it alone (some he tells he can smooth ‘em out, but won’t lighten the pull).

    Having said all that, I am considering a Glock 10mm if they ever get this CC in National Parks squared away! I’d like the firepower/penetration from a 10mm for larger 4-legged critters when carrying in the forests (I just wish Springfield would come out with an XD in 10mm!).
    Last edited: Apr 4, 2009
  15. JWJacobVT

    JWJacobVT Well-Known Member

    Well Basic you are right about ammo availability for the 10mm. But right now even getting 45 ammo is difficult. I asked Springfield last year about a XD in 10mm, I also asked S&W MP, I was told by both maybe some day. Right and I will just hold my breath.
  16. legion3

    legion3 Well-Known Member

    One is big and fast (if loaded properly-which many aren't)
    the other is big and slow :uhoh: ;)

    Also called the 40 Slow and Weak by the 10mm folks
  17. fxstchewy

    fxstchewy Well-Known Member

    I have a XD45 Service, i really like this pistol, no issues and fits my hand perfect, 14 rds don't ain't bad either.

Share This Page