View Poll Results: which one is the better caliber .40s&w or 10mm

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  • .40s&w

    66 67.35%
  • 10mm

    32 32.65%
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  1. #21
    AK_Maine_Iac is offline Junior Member
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    10mm it is bigger and rules. If you want a 40S&W just shoot lighter 10mm loads. Easy for me because i roll my own.

  2. #22
    Jeremy55 is offline Junior Member
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    I think the 10x22mm will serve you just fine for self defense against humans. The 10mm Auto, in my humble opinion, is just a little on the heavy side for self defense against a human attack.

  3. #23
    Jeremy55 is offline Junior Member
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    Nothing wrong with the 10x25mm mind you, but I think the 10x22mm will serve you just fine for self defense against humans. The 10mm Auto, in my humble opinion, is just a little on the heavy side for self defense against a human attack.

  4. #24
    AK_Maine_Iac is offline Junior Member
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    Yes the 10mm auto may be on the heavy side. I can under stand that if you live in a warm state, something else may work for you. When you live in a Cold state and the temps are well below 0 and the bad guy has on heavy carharrt coveralls and heavy winter carhartt jacket. You will need something with a little more oomph My second choice would have been 357sig.

  5. #25
    BCGUNCOLL is offline Junior Member
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    10mm imho. cost= not that much of a difference. as one fellow said previously....i roll my own so it doesnt really matter.

  6. #26
    Bisley's Avatar
    Bisley is offline Senior Member
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    I couldn't answer your poll because a .40 S&W and a 10mm are the same caliber.

    However, if you meant which chambering do I like better, I guess I'll take the 10mm, since it is a somewhat unique chambering. It has power approaching the .41 magnum, but in a semi-auto platform. Something about a 16 shot .41 magnum makes me feel all warm inside.

    The .40 S&W, on the other hand, is less useful to me than the .45 ACP which has been around for a hundred years, has a pleasant recoil, and outperforms the high pressure .40's, with less wear and tear on the gun and the shooter.

  7. #27
    denner's Avatar
    denner is online now Senior Member
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    Quote Originally Posted by DepOne View Post
    They learned that lesson years ago in Miami. Whatever idiot had them carrying 9mm subsonic rounds should have been shot himself. Those rounds hit where they were supposed to but couldn't penetrate enough to cause damage capable of stopping the assailants. Subsonic 9mms are designed for suppressed machine pistols

    I spent a day with the FBI HRT guys a few months ago and found it interesting they were almost all carrying 1911s in .45 ACP.
    The FBI was not carrying sub-sonic 9mm rounds in the Miami Fiasco. 115 grain Winchester Silvertips were used, the 9mm subsonic rounds were introduced much after the Miami Fiasco. I believe you got your facts backwards, the early 147's were known to over penetrate and not expand fully or not at all. Generally in any caliber the heavy end of the spectra will penetrate deeper than the lighter faster sibling at least in a properly functioning hollow point; the exception being perhaps some +p+ 9mm chamberings. Likewise, it's not optimal to be facing a murderous highly trained combat Vietnam Vet armed with a MINI 14 chambered in 223 with any pistol, even a .10mm.
    Last edited by denner; 04-15-2012 at 04:32 PM.

  8. #28
    yeti's Avatar
    yeti is offline Junior Member
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    I voted for 10mm. The 10mm is one seriously awesome round! It does cost more to shoot unless you are a handloader, but the capabilities are much greater than the .40

  9. #29
    dman is offline Junior Member
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    A lot of this depends on what you want it for ? I would be very nervous about shoot a 10mm. in my home if I have a family.
    Where is that round going to stop after it goes through the BG because it's not going to stop in the bad guy.
    A 40 , frag hollow point ,ok , I feel a little better.

  10. #30
    Bisley's Avatar
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    Quote Originally Posted by dman View Post
    Where is that round going to stop after it goes through the BG because it's not going to stop in the bad guy.
    I tend not to make over-penetration a deal-breaker for me when selecting a self defense chambering. In reading about police and civilian gun fights, the one thing that really stands out about them is that most of the shots fired, miss. This is true, even at very close range. That being the case, it seems counter-intuitive to worry excessively about firing rounds that might over-penetrate, since they would probably be less lethal than the missed shots.

    The more important concern to me is actually being able to hit the target, under extreme stress, and having the discipline not to shoot in a direction where there are innocents in the background, with whatever round you intend to fire. That is a very tall order, by itself, if your life is being threatened.

  11. #31
    berettabone is offline Banned
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    If you look at ballistics charts, with all kinds(manufacturers) of ammo, between the .40 and the 10mm.....using 180 gr. and 200 gr. respectfully..the only major difference is ft. lbs. of force, and cost.

  12. #32
    papahawk's Avatar
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    Quote Originally Posted by berettabone View Post
    If you look at ballistics charts, with all kinds(manufacturers) of ammo, between the .40 and the 10mm.....using 180 gr. and 200 gr. respectfully..the only major difference is ft. lbs. of force, and cost.
    Study the 2 different rounds in a reloaders manual: .40 dont even come close to the 10mm. I shoot and load for both, and there is NO WAY IN HELL i would try to push a 180 gr bullet at 1400 ft/sec out of my .40. my handloads for the .40 run 975-980 ft/sec. my 10mm loads run 1430-1440 ft/sec. both using 180 gr XTPs. OH yea I voted 10mm

  13. #33
    berettabone is offline Banned
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    Like I said...........

  14. #34
    Top Gun Supply's Avatar
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    .40 on steroids = 10mm

    10mm is my preferred carry round.

  15. #35
    stlbob is offline Junior Member
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    A .40 is to a 10mm,what a .38 special is to a .357 Magnum.

    10mm every-time.

  16. #36
    Arney is offline Junior Member
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    Price and availability of the 10mm is my only concern. As far as over penetration, for what is worth, for defense purposes I use hollow point ammo.

  17. #37
    g32767 is offline Junior Member
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    I'm new to all of this. Having said that, it seems to me that .40 cal is slightly bigger, and I'm wondering why everyone says 10 mm is bigger? Doing the math: 1 cal = 1 inch. There are 25.4 mm in one inch.

    .4 Cal x (25.4 mm / Cal) = 10.16 mm. So, 40 Cal is .16 mm bigger than 10 mm, right? What am I missing?

    I found the answer to my own question (after posting the above) on another web site. The short answer is that 10 mm ammo is slightly longer, uses a larger pistol primer, has a higher SAAMI maximum pressure, and comes in heavier weights. So, generally speaking, the average 10mm bullet generally uses more propellant and has more mass.

    To lay it out completely

    10mm uses large pistol primers
    40S&W uses small pistol primers

    10mm has a SAAMI maximum pressure of 37,500psi
    40S&W has a SAAMI maximum pressure of 35,000psi

    Both fire a 0.400inch diameter bullets (0.401inch cast bullets)
    10mm has a typical bullet weight range of 135gr to 220gr
    40S&W has a typical bullet weight range of 135gr to 180gr

    Case dimension are very similar with the 10mm being 0.142 inches longe

  18. #38
    hammer1 is offline Junior Member
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    I have a smithand wesson 1006, I love the 10mm. Ive experimented with everything from 135s to 220s. With power pistol you can get a 135 moving over 1700. I took a whitetail doe with it at about 35 yards. It was a large through and through wound.

  19. #39
    Cait43's Avatar
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    FYI: 10mm equates to 0.393700787402 caliber..... Just as 9mm equates to 0.3543307086618 caliber........

    What handgun and caliber is best suited all comes down to personal choice.... There is no handgun that is the best one for all to use........

  20. #40
    MaxResponse is offline Junior Member
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    I am a 45 acp fan myself but when I had a FFL, I carried and pushed the 10mm. When most guys asked me why I prefer the 10mm, I explained, for me; it is just a tough round to ignore. If confronted in cold weather and your assailant is wearing multiple layers, the 10 can handle this without issue. Warm/hot weather, a 9mm is fine and the 40 is better.
    For a different comparison but one that will help explain my thinking. I know most will disagree with my thoughts above but I remember when we bought a Grand Cherokee with a 318 V-8 several years ago over a Dodge Durango with a 360 V-8. At the time, we had a 16 ft. pleasure boat we trailered 40 miles nearly every weekend. When we were offered a great deal on a 22 ft. we jumped at it. The Gran Cherokee struggled with this larger boat and at times I didn't know if I was driving or the 22 ft. boat behind me was. I then had to go get the Durango that I should have bought in the first place.
    I had much rather have too much weapon than not enough.

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