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  1. #1
    Dsig1's Avatar
    Dsig1 is offline Member
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    Short 9mm Cor Bon JHP

    I was just down in my safe, consolidating ammo to make room for some incoming new rounds. I had half a box of Federal Hydro.shock JHP 9mm Luger and half a box of Cor Bon JHP 9mm Luger so I was naturally combining them. When I set them in the tray, the Cor Bon was about 1/16" to 3/32" shorter than the Federal. I brought out some snap caps and WWB FMJ and both were the same size as the Federal. What would account for the Cor Bon being shorter? It say 9mm Luger on the casing rim and has shot fine through my XD 9SC. Any insights? Do you think it's safe to shoot?

  2. #2
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    They're not the DPX bullets are they? The DPX is longer than a normal bullet because it's 100% copper, but not sure about their other JHP.

  3. #3
    mactex is offline Member
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    You didn't mention what the weight of the bullet was. There are two possibilities that I'm aware of. First, Corbon sometimes uses a lighter bullet to get a higher velocity. A lighter bullet would set a bit further into the case since it is also smaller. Second, Corbon could simply be seating the bullet deeper to increase pressure in the case and, thus, velocity.

  4. #4
    Liko81 is offline Member
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    The 19 of 9x19mm is the case length, not the overall length of the bullet. That overall cartridge length has more relaxed tolerances, though there is a maximum. Most cartridge designers get as close to it as possible so they're not stuffing the bullet deeply into the casing, so the cartridge has as much initial space for powder flash as possible; that allows them to make the hottest load possible that still conforms to SAAMI pressure limits.

    If the bullets fit the mag and cycle reliably, I say use them, but I wouldn't say you know that a certain gun reliably cycles a certain ammo till you've shot at least a couple boxes of the stuff. You know it works in the XD, so I say save them for the XD.

  5. #5
    Dsig1's Avatar
    Dsig1 is offline Member
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    Thanks for the replies. They have never had a problem cycling so I plan on using them in my XD at my next range visit. I'll probably load a few of them and a few of the Federals into an extended mag, intermittently with some WWB FMJ just to make sure the XD will eat everything without a hiccup. Then I'll feel good about carrying the mix for CC.

    Also, the Cor Bon is 115 gr. and the Hydra Shok is 124 gr. so this would lend itself to mactex's suggestion.

    Thanks again!!!

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