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+p in .40 S&w?

Discussion in 'Caliber Corner' started by 2hand, Aug 18, 2012.

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  1. 2hand

    2hand

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  2. dkf

    dkf

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    SAAMI does not recognize .40 +P ammo. Same with 9mm +P+ and .380 +P. Basically a manufacturers way of saying that the ammo is loaded towards the upper end.
     


  3. cowboy1964

    cowboy1964

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    It's like +P+ in 9mm. There is no SAAMI standard.

    I wonder how many companies that make +P .40S&W actually pressure test their stuff.
     
  4. ABNAK

    ABNAK

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    Obviously, there is no SAAMI spec for ".40 +P". Any company doing so is winging it......technically.

    That said, as a recent thread here has informed me, the .40 *can* be loaded to hotter than current commercial loadings. I would guess that these BB/DT/GA/Underwood loads attempt to do just that. :dunno: If I'm wrong please correct me.
     
  5. 2hand

    2hand

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    Little freaky. There is a shotgun guy I've talked with that does ballistic testing for fps & psi for shotgun reloads. Kinda wish there was one for pistol/rifle ammo.
     
    Last edited: Aug 18, 2012
  6. JW1178

    JW1178

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    Well, all +P is saying is a plus more powder/power. There is no actual "spec" so it really doesn't mean anything except you are probably getting some hot forty. The Ga Arms ".40+P+" is some hot stuff. I don't have a chronograph but judging by the flash, bang, and the way it kicks it has something going there. I know that all can be subjective but that little round has thump.
     
  7. dkf

    dkf

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    They exist for metallic cartridges as well. Something the major manufacturers monitor.

    Proof pressures are often sizeably higher than max rated pressures however most firearms can withstand the proof pressure. You can inch closer to proof pressure really but your dancing on the edge.
     
    Last edited: Aug 18, 2012
  8. 2hand

    2hand

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    "They" as in I can send 5 of my reloads and get accurate pressure and velocity data?
     
    Last edited: Aug 18, 2012
  9. dkf

    dkf

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    I was referring to the manufacturers as I thought you were referin g to someone that manufacters reloaded ammo. I do not know of anyone who does pressure testing of loads. Would probably cost a decent chunk of coin.
     
    Last edited: Aug 18, 2012
  10. bac1023

    bac1023

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    I don't shoot anything unless it recognized by SAAMI. Basically if they don't recognize it, neither do I.

    40S&W is already a high pressure round.
     
  11. 2hand

    2hand

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    Ahh, got me all excited. I wonder what the appeal would be for the reloading community to have a resource like this. Be able to send a load and get real pressure data back.


    Kinda what I was thinking.
     
    Last edited: Aug 18, 2012
  12. Yankee2718

    Yankee2718

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    The 40 isn't loaded to any higher of a pressure than 9mm? Both are 35k psi. 9mm +P is spec'd higher than 40 to 38.5k psi.
     
  13. fredj338

    fredj338

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    Actually there is. The +P designation is for higher pressure. It's being used to describe higher vel, but it's not really correct terminology. FWIW, I can make flash & bang that is neither higher vel or higher pressure.:dunno: I am always dubious of such claims but it is a free market. I am sure they are manuf safe ammo, or they wouldn't be in bus long, but the +P moniker isn't really accurate.
     
    Last edited: Aug 19, 2012
  14. NEOH212

    NEOH212 Diesel Girl

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    +1 :thumbsup:

    This is very sound advice people! It just may save your guns life someday. :whistling:
     
  15. What are their velocity claims?
     
  16. Joshhtn

    Joshhtn The eBay Guy Silver Member

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    This.
     
  17. ABNAK

    ABNAK

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    1300fps from what I guess is a standard 4" barrel. In the case of Georgia Arms it's a 155gr Gold Dot.
     
    Last edited: Aug 19, 2012
  18. Damn that's hot for a .40.
     
  19. ABNAK

    ABNAK

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    Granted, I'm not a big Gold Dot fan, but I wasn't impressed with the expansion. Years ago I fired one into a real gelatin block and recently shot one into my pool. Both were through some type of simulated clothing first. You would think that with those screaming velocities even a Gold Dot would open up REAL wide (kinda like that Underwood GD 124gr +P+ 9mm I saw the video of), but they didn't. In the high .50 caliber range, like .57 or .58 IIRC. That's not even 1 1/2 times it's diameter.
     
  20. gatorboy

    gatorboy

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    It's pretty nice
    So is 9mm. I think you're logic is sound, I feel 9mm and 45ACP both benefit from a bit more velocity and energy when packed in +P cases. I don't go for +P+ even though there are +P+ cases. No 40 +P cases but the two manufacturers that advertise them will both tell you they are at 35K or under. It is a marketing designation for their hot ammo when they have the same bullets loaded at less velocity. It's really for their customers.