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Thread: 9MM vs .40 Cal

  1. #51
    David_Pavlich's Avatar
    David_Pavlich is offline Junior Member
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    Quote Originally Posted by Cat View Post
    You guys got me thinking so much in this lol, I read a lot and do a lot with my RO at the range.( RO is Range Officer ) So I was looking on some place I was reading up on this.( The why and why not ) My be this can help. FBI Site.
    FBI Handgun Wounding Factors and Effectiveness - FirearmsTactical.com
    That was an interesting read. Thanks for posting the paper! As far as the science behind caliber choice, I guess it really comes down to what you can shoot proficiently under duress. I'm a .45 ACP person as the best defensive weapon. However, if I tell a potential buyer that the .45 is the best, but the person hasn't fired a large bore handgun, it may be that the person never really masters the thing. So...if you can master a .380 and that's it, that's what you use for self defense. You have to hit what you're shooting at to save your bacon. Theory goes out the window.

    David

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  3. #52
    Bob Wright's Avatar
    Bob Wright is offline Senior Member
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    I am somewhat out of my element in these auto loader topics, but I'd advise you to get any caliber and get profieient with that gun/caliber before giving any consideration to carrying a gun for social purposes. After that, get whatever you feel comfortable with.

    Bob Wright

  4. #53
    Darkman is offline Junior Member
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    Question 9mm VS 40 Cal

    Quote Originally Posted by berettatoter View Post
    Each caliber has its strong and weak points. The .40 has no real "weak" points in the power factor department, but it is more expensive and some people have a little harder time getting follow-up shots to hit the target as quickly as they could with a 9mm. The .40 carries with it more muzzle energy than the 9mm does, that I think we can all agree on, but the right 9mm is no slouch. The 9mm has been around a hundred years or so, and it has made a lot of poor souls occupy the great beyond. I feel that your question can only be answered by you yourself. Get your hands on a few different examples of each caliber and shoot them both. Some handguns are designed differently than others, and a .40 or 9mm will shoot differently in these guns. Do your homework before you go out and drop five to six hundred dollars on a gun you are not really happy with. JMHO.
    I have a beretta 96 and the recoil does not fill much different than the 92 9mm or M9 I shot in the Air Force, also the reason I got the 40 cal is I had heard from a lot of sources that the 9mm was a very fast and hot round and you had a greater chance of a round going through a person and hitting someone behind them than you would with a 40 cal.

  5. #54
    paratrooper is offline Senior Member
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    Quote Originally Posted by Darkman View Post
    I have a beretta 96 and the recoil does not fill much different than the 92 9mm or M9 I shot in the Air Force, also the reason I got the 40 cal is I had heard from a lot of sources that the 9mm was a very fast and hot round and you had a greater chance of a round going through a person and hitting someone behind them than you would with a 40 cal.

    If there's one thing and only one thing to consider about the 9mm, it's not the worry of over-penetration.

  6. #55
    Steve M1911A1's Avatar
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    Quote Originally Posted by Darkman View Post
    ...[T]he 9mm [is] a very fast and hot round and you had a greater chance of a round going through a person and hitting someone behind them than you would with a 40 cal.
    The truth is exactly the opposite, I believe.

  7. #56
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  8. #57
    Donn's Avatar
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    Nice weather we're having.

  9. #58
    paratrooper is offline Senior Member
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    We're getting rain here......lots of rain. But not so much at one time as to pose flooding problems.

  10. #59
    Scrappy is offline Junior Member
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    There you have it... pros and cons, dos and donts. Personnaly I prefer the 9mm, for capacity and recovery. If i feel the need for more punch, Ill take my .45
    Ive heard .45 too slow, but I havent heard of anyone outrunning one yet! 9's are cheaper, and with a 147g jhp, if you HAD to shoot someone, I dont think they'll be able to tell you the difference. Just my take

  11. #60
    paratrooper is offline Senior Member
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    If someone handed me a 9mm and told me to go defend myself, I'd say okay.

  12. #61
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    Quote Originally Posted by Cat View Post
    Go back to WWII are boy had 9mm. And the 9 was getting are man killed.Thick and heavy clothing No power in them, That is where colt came out with the .45. Police Officers drop 9mm for .40cal .. Note 9mm is a 38'special. In to day world, Most have .40 or 10mm and 45cal. For a power house pistol.
    A 9mm should have better penteration than a 45acp. and in real combat the 9mm and 45acp are basically the same.
    Then I did my own research and found something amazing: A 127 grain Winchester Ranger +P+ fired into bare ballistic gelatin will impact at 1210 feet per second, penetrate 12-14 inches, and expand to right around .70 inches. My favorite .45 ammo, Federal Hydra-shocks, will impact the same gelatin at a slower 800 feet per second, penetrate 12-14 inches and expand to right around .70 inches. Wait a minute, it sounds like these two rounds would pretty much cut the same wound path, right? This information supported what Iíd been told by another group that conducted ammo test of pigs: You cannot tell a decent 9mm wound path from a decent .45 wound path

    If the rounds are going to do the same damage, why not use the one that affords me 19 pulls of the trigger without a reload instead of 8? As it turns out, those battlefield reports from ex-military guys using the 9mm in combat actually tell me more about military pistol training than the power of the 9mm. The Army does not give the soldier nearly the pistol training that they do the rifle, so the problem is that many of these reported hits are not in vital areas and that is the problem, not the size of the ammunition itself. On top of that, the standard military 9mm ammo is what you and I use for target practice, NOT self-defense. Thatís right, soldiers are issued standard FMJ hardball; now the clouds are really beginning to part!

    Is it really worth arguing in the first place? Probably not. If you're a fan of and comfortable with the .45ACP weapons, carry one. If you prefer and are comfortable with the 9mm, carry that. If you like the .40 because it makes you feel like you've solved a difficult conundrum, then carry it.

    Me? I still make a choice every day based on how I'm dressing and where I'm going. Variety is good. Don't pick just one. Have one of each available and make your choice as each set of circumstances looms.

  13. #62
    paratrooper is offline Senior Member
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    I'm not convinced that any one caliber will do everything.

    That's what I have way more than just one caliber handgun.

  14. #63
    zeke4351 is offline Junior Member
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    I think 9mm being cheaper is a thing of the past. The .40 has become as popular and the prices have come down for the .40 and has been easier to find than 9mm lately. As of right this minute range ammo for the .40 is 27 cents a round and 9 mm is 26 cents a round. Maybe the 9mm has gotten higher and caught up to .40 I don't know but as of now there is virtually no difference in cost. I like them both just making a point.

  15. #64
    zeke4351 is offline Junior Member
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    Quote Originally Posted by Packard View Post
    Yes, I understand why they did it. But a by-product of that necking-down was improved feed reliability. I just don't understand why the necked-down rounds should feed more reliably. Maybe one of the other members here can explain.
    Because you are loading a 9mm bullet in a .40 S&W hole.

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