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Can change factory 9mm FMJ with JHP bullets?

Discussion in 'Handloading and Reloading' started by DefiantDad, Dec 6, 2012.

  1. DefiantDad

    DefiantDad Well-Known Member

    Folks - is it possible (safely) to change FMJ bullets on factory 9mm ammo to the same weight JHP bullets that, say, I purchase from a reloading supplier? (Bullet manufacturer)? I saw on TV (haha) some people use momentum to extract the bullet from a case by slapping some kind of stick device, and the bullet popped out. Not sure if the powder, etc. remained the same in the case.
  2. bigfatdave

    bigfatdave Well-Known Member

    You want to use a kinetic bullet puller to remove the FMJ projectile, sweep up the powder, put it back in the case, and then seat a JHP in place of the FMJ?

    I suppose it is possible, but it won't really save you any money, and seems like a giant waste of time and effort to me. You'll be essentially eliminating what little quality control was used to produce the cheap range ammo and then seating a better bullet on a random hand-load casing.

    Why not just buy some loaded HP ammo?
  3. 45_auto

    45_auto Well-Known Member

    It's no big deal to swap bullets. Anyone who reloads has a kinetic bullet puller. They're used to remove bullets if you seat them too deep, find a bad primer after loading, etc.


    Just put in the FMJ, whack it against something to pop the bullet out, then dump the powder back into the case. Then you would want a press to seat and crimp the JHP.

    Don't know why you would want to do it, if you're buying loaded ammo you would be better off just buying the hollowpoints in the first place.
  4. joecil

    joecil Well-Known Member

  5. Certaindeaf

    Certaindeaf member

    Rube Goldberg would approve.
  6. longshot7.62x51

    longshot7.62x51 Well-Known Member

    Im not gunna ask why but if its the reason I think it is it will work just dont get cought
  7. Blackrock

    Blackrock Well-Known Member

    Either way you will still need a press and a set of dies to reassemble everything so you might as well get into reloading your own custom ammo.
  8. mljdeckard

    mljdeckard Well-Known Member

    Don't get caught....what?
  9. tightgroup tiger

    tightgroup tiger Well-Known Member

    Not to mention the case will need to be resized and necksized again on a press to get the proper neck tension back so you don't end up with bullet setback problems.

    I also don't understand what was mentioned about not getting caught. Maybe I shouldn't ask.
  10. Atbat82

    Atbat82 Well-Known Member

    Care to share?
  11. ATLDave

    ATLDave Well-Known Member

    There's an even better way to get the brass from FMJ ready for reloading with JHP bullets: shoot it.
  12. hentown

    hentown Well-Known Member

  13. Kahr33556

    Kahr33556 Well-Known Member

    why ??????????????????????????????????????????????????????????????:uhoh:
  14. FROGO207

    FROGO207 Well-Known Member

    Some times a bullet of the same weight will be a bit longer with having the hollow point and all. Putting that bullet into the casing to the same length as the original bullet MIGHT raise pressures when fired to unsafe levels. When we reload we use dies to make the brass smaller so that when you put in a new bullet it will not slide too far back into the case as that also raises pressures when fired and could make the round unsafe. You should at least check out a book on reloading at the library and read some about reloading handgun ammunition before attempting to do something that might be unsafe. Everyone here wants you to accomplish what you want to do safely. Just sayin.:)
  15. DefiantDad

    DefiantDad Well-Known Member

    Honestly, I have no idea why doing this might not be "on the up and up" but anyway it seems like quite a bit of hassle, and I need those reloader presses. So, probably moot point for me.

    I am just asking as a matter of course out of curiosity, as I have FMJ factory ammo, but wondering how straightforward it might be to put another bullet on the case. Didn't realize the powder will come out (well, probably should have expect that, logically, if one swings the bullet puller thing with momentum).
  16. BYJO4

    BYJO4 Well-Known Member

    It seems like a big waste of time and energy to me. Either buy factory JHP ammo in the first place or shoot the FMJ ammo and then reload it any why you want to.
  17. rcmodel

    rcmodel Member in memoriam


    In general, it is a huge waste of your time & money.

    To do it right, & safely, the cases have to be resized before you seat new bullets.

    And as already mentioned, FMJ and JHP bullets are shaped differently.
    A JHP will usually have more bearing surface and friction then a FMJ of the same weight.

  18. 1SOW

    1SOW Well-Known Member

    AS said above about resizing the case, PLUS.

    If you just WANT to do it, A JHP of the same weight, has to be seated at the same "SEATING DEPTH" or longer as the factory cartridge to be a safe load.

    Measure several of the factory loads overall length (OAL), and average them to an get the "average OAL".

    Then: Measure the new JHP bullet. If the new JHP is .009" shorter than the FMJ bullet, then seat the JHP to a .009" "shorter OAL" than the FMJ had.
    This is just one example, to show you how to change the new OAL.

    This will give you the same average seating depth, pressure and not too far off in speed.

    It's not unsafe, but it sure isn't cost-effective unless the the FMJs were free.
  19. gamestalker

    gamestalker member

    Since we are talking about 9mm, it would be very necessary to get seating depth within suggested minimum SAAMI spec, in other words don't seat it deeper than indicated for that particular bullet. Use your barrel and magazine to determine an OAL that would be functional, but never deeper than is necessary to function in your firearm. Proper OAL will be different with different bullet types / brands, so using the FMJ as a guide isn't a good / safe idea and could lead to a KB if pressures go beyond the limits.

    Second concern would be not resizing the cases after pulling the bullets. The 9mm is already a set back sensitive cartridge and needs to have full neck tension to prevent such. You'll absolutely need a resizing die.

    Next is pulling the bullets properly. For this you'll need to buy a bullet puller. Trying to pull bullets without one will result in deformed bullets, that is if you can pull them without one?

    Speer #10 says that in a test they performed to determine by what degree pressures increased in cartridges in which the bullets were deliberatly seated .030" deeper than what produced a safe and normal 28,000 cup, increased pressures to a dangerous 62,000 cup, or more than doubled.

    Sounds like you need to purchase some reloading materials and tools. It's a great hobby when approached as intended.

  20. ArchAngelCD

    ArchAngelCD Well-Known Member

    If you have the equipment necessary to load a JHP bullet in place of a pulled FMJ bullet you might as well just load your own starting with a JHP bullet. In the end it will be easier.

    For those who wonder why it would not be "on the up and up", I'll take a guess at what longshot7.62x51 was eluding to. (not speaking for him, just taking a stab at it)

    In some states (like NJ) JHP ammo is illegal for the common folks to carry and it difficult to acquire. I'm only guessing longshot7.62x51 might have though this was the case and the OP was looking to switch a FMJ bullet with a JHP bullet for better SD. (ergo the just don't get caught) :p

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