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9mm reload ?

Discussion in 'Reloading' started by 10head, Apr 27, 2011.

  1. 10head

    10head

    105
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    Dec 26, 2005
    missouri
    want to load some 115gr 9mm xtp's with 3n37, vitv manual lists at 1.141 loaded one looks like a mk48 torpedo, cant find any other info, any thoughts would be helpfull
     
  2. Use your mag to determine over all length. OAL 1.145 using MG 121IFP for my G34 open gun.
     


  3. bandmasterjf

    bandmasterjf

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    Aug 26, 2009

    I found that most factory loads aren't even close to the OAL. I don't go over, but make sure that mine will cycle good. I'm usually in the 1.08-1.12 area. I've never had any pressure or cycling problems.
     
  4. fredj338

    fredj338

    21,709
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    Dec 22, 2004
    so.cal.
    The issue will be if they fit the chamber of your pistol. The XTP has a sharp shoulder, often hits the rifling sooner than later. Pull the bbl, drop the round in, it should fall in & out easily.
     
    Last edited: Apr 27, 2011
  5. 10head

    10head

    105
    0
    Dec 26, 2005
    missouri
    at 1.145 they just fit mag but i wonder if i have enough grip on bullet,dont know how much shorter i can go before pressure gets to high
     
  6. fredj338

    fredj338

    21,709
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    Dec 22, 2004
    so.cal.
    I like at least 1/2 caliber in handgun bullets inside the case.
     
  7. 10head

    10head

    105
    0
    Dec 26, 2005
    missouri
    hey fred so if i loaded to 1.110 i should have 180 inside case, i think?. the case is .750 bullet is .540 oal 1.110. 9mm is .356 so 180 is a little over half, right?
     
  8. *QUOTE*
    I like at least 1/2 caliber in handgun bullets inside the case.

    When you're shooting a G34 9mm major (power factor of 165+) you load as long as possible. I'm pushing a MG 121 IFP @ 1450 FPS for a PF of 175. Lots of gas makes the comp work better.
     
  9. GioaJack

    GioaJack Conifer Jack

    10,016
    1
    Apr 14, 2009
    Conifer, CO



    I'm a bit confused, which is not at all unusual for me. How does loading 'longer' create more gas?

    The shorter the AOL the less the case capacity, the less the case capacity the higher the pressure. I guess I don't understand how the longer AOL is creating more 'gas'. :dunno:


    Jack
     
  10. fredj338

    fredj338

    21,709
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    Dec 22, 2004
    so.cal.
    Well that is fine, my guns, my reloads, my rules. I like enough bullet inside the case to withstand chambering 100% of the tiem, abotu 1/2 caliber min works for me. It's not carved in stone.
    FWIW, I learned along time ago, if you need more gun, get a bigger one, don't reload to insane pressures to get there. I can get 175 in any 45acp w/o even getting to out of traget load pressures.:dunno: To each his own though.
    Jack I don;t think DOD was linking the two together, jut pointing out if you are playing w/ small thermal nuclear devices, you load long for what ever margin of safety is left.
     
    Last edited: Apr 27, 2011
  11. njl

    njl

    7,800
    670
    Sep 28, 2000
    :noitacoL
    Loading long for 9mm major is the norm AFAIK. I suspect it's to make more room for powder/gas and/or to help keep the pressure from spiking too high. The reason they do it is to maximize the number of rounds they can get in a mag and probably also because 9mm brass is plentiful/cheap/free while .38super brass is not something you're likely to find piles of left behind at the range. If someone would design a .45acp that has the mag capacity of a 9mm (same length mags), the gamers would shoot it.
     
  12. fredj338

    fredj338

    21,709
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    Dec 22, 2004
    so.cal.
    There are several high cap 45acp, 13+1, that are easy to run & cheap enough. For IDPA, you only get 18rd max stages anyway, no real need. I have just never liked hot rodding calibers, pistol or rifle. If I need more HP, go big or go home.:supergrin:
     
  13. njl

    njl

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    Sep 28, 2000
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    Do people bother with 9mm major in IDPA? I think it's all for USPSA...where 13+1 is not high capacity. High capacity is mag capacities somewhere up in the 20s, and stages can be way more than 18 rounds.
     
  14. fredj338

    fredj338

    21,709
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    Dec 22, 2004
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    Yeah I know, I used to shoot IPSC, gamers. Real men shoot real guns.:tongueout: I can see the point but pushign 9mm major is eventually going to bite you in the ass. Glocks are cheap though.:whistling:
     
  15. My G34 open gun 28 +1 in a 170 mm mag. More powder = more gas. If Glock made a 38 Super I'd shoot it.
     
    Last edited: Apr 28, 2011
  16. MikeyBones

    MikeyBones

    5
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    Dec 10, 2005
    Portland, Oregon
    To the original poster: #7 Hornady manual calls for an OAL of 1.060" because of their shape; they seat deeper than a long round nose so weigh your charges carefully. If you use the powder manufacturers data, a lot of times they quote generic data that covers too broad a spectrum of bullet shapes. I load the 115 gr xtp's at 1.060, and although they seem way too short, they feed and shoot well. Really, it all boils down to what your particular gun likes to eat ammo wise. If you don't seat deep enough your bullet can actually move in of the case from recoil....
     
    Last edited: Apr 29, 2011
  17. Colorado4Wheel

    Colorado4Wheel

    14,937
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    Nov 2, 2006
    CO
    Get a 9X21mm reamer and make your own basically.

    Brass cost about the same. Longer length. It's kinda old school.
     
  18. PhantomF4E

    PhantomF4E

    1,094
    3
    Aug 24, 2010
    South Florida
    I have loaded thousands of 9 115g MG at 1.142 oal with zero problems in any of my 9's . Works for me and my shooters from an old P08 to a Kahr p9. There is a little more to it than that but that is my standard oal. for just about any rn load.
     
  19. *QUOTE*
    Get a 9X21mm reamer and make your own basically.

    A 9mm Glock mag will only take a OAL of 1.45, a longer case will provide no advantage.
     
  20. njl

    njl

    7,800
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    Sep 28, 2000
    :noitacoL
    1.45" in a Glock 9mm mag? That sounds way off.