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

+P 9mm ?

Discussion in 'Handloading and Reloading' started by sniper7369, Sep 16, 2008.

Thread Status:
Not open for further replies.
  1. sniper7369

    sniper7369 Member

    Joined:
    Sep 2, 2008
    Messages:
    116
    Location:
    The People's Republik of New York
    OK, maybe a dumb question here. I was perusing my load manuals and all of them list +P .38 loads, but none for 9mm or anything else. Is there a reason for this? What exactly constitutes a +P or +P+ load in 9mm? :confused:
     
  2. D. Manley

    D. Manley Member

    Joined:
    Jul 2, 2008
    Messages:
    360
    Location:
    Southern US
    "CLICK" for SAAMI pressure specs.

    There are a few published 9MM +P loads to be found but not many. Probably the easiest to find is Ramshot's...they list +P loads for 115, 124 and 147 grain bullet all using True Blue.
     
  3. ArchAngelCD

    ArchAngelCD Member

    Joined:
    Nov 25, 2006
    Messages:
    21,688
    Location:
    Northeast PA, USA
    I think it's a pressure problem. Since the current SAAMI limits for a .38 Special are set at only 17,000 PSI pushing the charge to only 18,500 PSI isn't a big deal. (considering the old limits for the .38 Special +P were 20,000 PSI and originally 21,500 PSI)

    The 9mm has a limit of 35,000 PSI which is fairly high to begin with. Pushing the limits much higher would really stress older pistols even at 38,500 PSI. There aren't many non-Magnum handgun cartridges with higher pressures than a standard 9mm and none above the 9mm +P limits other than the .357 Sig.

    I have a feeling it's as simple as that...
     
  4. rcmodel

    rcmodel Member in memoriam

    Joined:
    Sep 17, 2007
    Messages:
    59,082
    Location:
    Eastern KS
    On the otherhand, it's a pretty simple matter to find a standard pressure load in a manual that gives higher velocity with the same bullet weight as factory +P.

    By carefully selecting a powder from all the load book recipes, you can get the same or better velocity without the +P pressure.

    rcmodel
     
  5. Steve C

    Steve C Member

    Joined:
    Jan 5, 2006
    Messages:
    4,640
    rcmodel is right on with +P velocity equivalent loads being listed in the load manuals. If you get the same or better velocity at a safe pressure there really is no reason to care if the pressure is at +P or not.

    For the most part you are only guessing about pressure when hand loading. Unless you are using exactly the same components listed in the manual, and how often does that happen in real life, the resulting pressures may or may not be within SAAMI spec. This is why loads are developed and not cook booked.
     
  6. evan price

    evan price Member

    Joined:
    Dec 7, 2005
    Messages:
    5,476
    Location:
    http://www.ohioccw.org/ Ohio's best CCW resour
    You get up around 1300 fps you are in +P territory. Most load manuals are on the conservative side- nobody will show a load up at the max for legal reasons, there is always a safety cushion. Develop your own loads using a chrono, and be prudent.
    I have good luck with what I have developed.
     
  7. sniper7369

    sniper7369 Member

    Joined:
    Sep 2, 2008
    Messages:
    116
    Location:
    The People's Republik of New York
    [/QUOTE]You get up around 1300 fps you are in +P territory. Most load manuals are on the conservative side- nobody will show a load up at the max for legal reasons, there is always a safety cushion. Develop your own loads using a chrono, and be prudent.
    I have good luck with what I have developed.
    [/QUOTE]

    See, that's what I was thinking. All of the manuals I've looked at list pressures way below the SAAMI max pressure, even the hottest max loads. I'd like to work up my own 124gr +P load though.
     
  8. ArchAngelCD

    ArchAngelCD Member

    Joined:
    Nov 25, 2006
    Messages:
    21,688
    Location:
    Northeast PA, USA
    On the powder front, give HS-6 a try. You will find it will provide you with higher velocities than most powders and do so with lower pressures. It's also a low flash powder which is a plus...

    With all the new powder that have been released in the past decade it seems HS-6 have been forgotten. Hodgdon discontinued both HS-5 and HS-7 but kept HS-6 in their lineup. There is a very good reason for it, HS-6 is an outstanding powder with many applications. (although I did like HS-7 a lot LOL)
     
  9. sniper7369

    sniper7369 Member

    Joined:
    Sep 2, 2008
    Messages:
    116
    Location:
    The People's Republik of New York
    Thanks, I'll pick up a can of HS-6 and see what I can do.
     
  10. Halo

    Halo Member

    Joined:
    Apr 20, 2004
    Messages:
    728
    Location:
    Charlotte, NC & part time in the beautiful Blue Ri
    I agree about HS-6, I've been very pleased with it in my 9mm loads. It also meters nicely.
     
  11. Galil5.56

    Galil5.56 Member

    Joined:
    Dec 20, 2007
    Messages:
    1,064
    I like HS-6 too, enough so that I use it for SD rounds in one of my 9's.

    If you are looking for "+P velocities" at std pressures in 9mm, you might try Unique and Power Pistol. Using the Hercules/Alliant max published charge of 6.2 grains of Unique behind a 124 JHP bullet gets me a chronographed 1230 fps. Another good one but flashy is Power Pistol. 6.5 grains PP which is below max gets me 1255 fps, with no signs of high pressure.

    If you want to pursue the HS-6 option, look around the net for 9mm major loads, and see what you can get when you run it at some real pressure!
     
Thread Status:
Not open for further replies.

Share This Page