40 s&w +p

This is a discussion on 40 s&w +p within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; Is 40 S&W a caliber that is highly recommended to use +P ammo like the 9mm Parabelum? I don't see slot of +P 40, but ...

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Thread: 40 s&w +p

  1. #1
    Member Array techieccw's Avatar
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    40 s&w +p

    Is 40 S&W a caliber that is highly recommended to use +P ammo like the 9mm Parabelum? I don't see slot of +P 40, but maybe I'm just not looking?

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  3. #2
    Member Array subhuman's Avatar
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    there is not a +P in .40 but if you want some hot ammo look at Double Tap, Buffalo Bore, Cor-bon and Underwood (very hot)
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    Member Array subhuman's Avatar
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    Underwood .40 ballistics

    40SW JHP 135 675 1500
    40 SW Gold Dot HP 155 582 1300
    40 SW XTP HP 155 582 1300
    40 SW Gold Dot HP 165 528 1200
    40 SW XTP HP 180 484 1100
    40 SW Gold Dot HP 180 484 1100
    GRAIN FT/LBS FPS

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    Member Array dirtysanchez's Avatar
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    You can stoke 180gr XTP's with Longshot to just shy of 1200.

    Max is 8 grains. I load mine to 7.7grains at 1.125

    Hornady Glock 22 Glock 27 PM40
    180gr 1.125" OAL
    XTP
    Longshot Muzzle
    Chg Wt. Vel. 10ft.
    G22 G27 PM40
    6.9 1105 1056 1050
    7.1 1112 7 1058 2 1056 6
    7.3 1133 21 1074 16 1086 30
    7.5 1162 29 1089 15 1124 38
    7.7 1186 24 1133 44 1121 -3



    Reloading's fun!

    Dirty

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    Senior Member Array flintlock62's Avatar
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    Fast is good, but accuracy is better, IMO. I usually reload mine around the mid range or lower.

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    Senior Member Array sensei2's Avatar
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    As subhuman said in post #2, there are NO specifications for a +P loading in .40S&W.

    Such +P loads in .38 Special, 9x19, and .45ACP have specific pressure limitations they must adhere to. These specs are set by SAAMI, the Sporting Arms and Ammunition Manufacturers' Institute, which sets the standards for every non-wildcat cartridge made in America.

    Other calibers besides .40 have no true +P ammunition either. Calibers such as .357 Magnum, 10mm, .357 SIG, are among them.

    No standards exist for +P+ in 9x19 (9mm) either.
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    Member Array techieccw's Avatar
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    Good to know. I was reading an article on personal defense network, and it recommended using +P, but he must of been referring to 9x19mm.

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    Senior Member Array sensei2's Avatar
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    Quote Originally Posted by techieccw View Post
    Good to know. I was reading an article on personal defense network, and it recommended using +P, but he must of been referring to 9x19mm.
    9mm and .38 Special self defense rounds are generally more effective at +P and +P+ pressures, but those loads have more recoil. I will typically use +P loads in my service and compact guns (Sig P-239/9mm and S&W 66 - when using .38 Special rounds), but I stick with standard pressure loads in my CM-9 micro 9, and my S&W 642 alloy J-frame.

    I also keep a 50 round box of 9mm Winchester 127 grain +P+ cartridges, "just in case" I ever feel the need for maximum power in that caliber.

    I feel that the additional power of +P loads in .45ACP aren't worth the extra recoil that comes with them. IMO, the good standard pressure SD loads in .45ACP are quite effective. But I do keep a 50 round box of Remington 185 grain +P cartridges, also, "just in case".

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    VIP Member Array Stevew's Avatar
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    There is no need for +P 40 S&W. If you feel the need for more power take look at the 10MM. The 10MM can be loaded to cover most needs.
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    VIP Member Array smolck's Avatar
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    All .40 is +p, meaning it is high pressure as it sits. My favorite round for defense though, next to .357 Sig.
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    Ex Member Array David Armstrong's Avatar
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    Quote Originally Posted by techieccw View Post
    Is 40 S&W a caliber that is highly recommended to use +P ammo like the 9mm Parabelum? I don't see slot of +P 40, but maybe I'm just not looking?

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    FWIW, it is not highly recommended to use +P ammo in the 9mm. It may be recommended for some situations or in some guns, it may not be recommended for others.
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    VIP Member Array Kilowatt3's Avatar
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    Quote Originally Posted by smolck View Post
    All .40 is +p, meaning it is high pressure as it sits.
    SAAMI spec for .40 is precisely the same as for 9mm (non +P).
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    Quote Originally Posted by David Armstrong View Post
    FWIW, it is not highly recommended to use +P ammo in the 9mm. It may be recommended for some situations or in some guns, it may not be recommended for others.
    By whom?

    Police agencies?

    Manufacturers? Not Ruger, not S&W, not Taurus, not CZ, not Kimber, not Sig.
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    Quote Originally Posted by gasmitty View Post
    By whom?

    Police agencies?

    Manufacturers? Not Ruger, not S&W, not Taurus, not CZ, not Kimber, not Sig.
    HK is one. There's literature on the P30 that suggests staying with standard ammo.

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    Member Array ShootingTheBull's Avatar
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    Quote Originally Posted by smolck View Post
    All .40 is +p, meaning it is high pressure as it sits.
    That's not what "+P" means. "+P" doesn't mean a round is "high pressure", "+P" is a specifically designated term as used by the Sporting Arms and Ammunition Manufacturer's Institute (SAAMI). And it only applies to certain calibers (being, specifically: 9mm, .45 ACP, .38 Special, and 38 Super). There are no other rounds designated "+P" by the industry organization that sets the standards.

    .40 S&W is standardized to operate at exactly the same pressure as 9mm. 9mm +P is a higher pressure level than .40 S&W. 9mm and .40 are both standardized at an average maximum pressure of 35,000 PSI; 9mm +P is standardized at 38,500 PSI. However, there are many rounds that are higher, even much higher pressure, than 9mm +P or other +P variants. Examples include .327 Magnum (45,000 PSI), .357 SIG (40,000 PSI), .454 Casull (65,000 PSI) and .460 S&W (65,000 PSI). By those pressure levels, all are higher and some are dramatically higher than 9mm +P, yet none are classified as +P.

    There are several calibers that you can buy so-called "+P" variants of, but aren't actually legitimate standards. Those include .380 +P, .40 S&W +P, and .45 Colt +P, or any round labeled "+P+". There are no standards for those labels, they have no formalized meaning. They're just labels that manufacturers stick on their ammo when the pressure levels exceed the actual standards. As such, most manufacturers include warnings in their owners manuals telling the user to never use any of that ammo.
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