Rimfire or Centerfire?

Discussion in 'General SA-XD/XD(M) Talk' started by McTamney, Dec 15, 2012.

  1. McTamney

    McTamney XDTalk 100 Member

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    This may be a dumb question but I just don't know and can't seem to find the answer. Is the XD9 Service model a rimfire or centerfire? Thanks in advance.
     
  2. Jarhead1987

    Jarhead1987 XDTalk 1K Member

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    Centerfire.
     
  3. McTamney

    McTamney XDTalk 100 Member

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    Thanks Jarhead
     
  4. mhen

    mhen XDTalk 1K Member

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    He answered your question, but I'm going to add a little to it.
    Center fire or Rim fire is pertinent to the caliber (the bullet it shoots) not the gun. 9mm Luger will ALWAYS be center fire, .45acp will ALWAYS be center fire. .22 Long Rifle will ALWAYS be rim fire. Center fire vs rim fire simply refers to where the primer is on the cartridge. On rim fires the primer is in the rim of the case. On center fires the primer is in the center of the cartridge.
     
    Last edited: Dec 15, 2012
  5. gsh341

    gsh341 XDTalk 5K Member

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    While on the surface this seems like a silly question, there is 9mm rimfire ammo out there.

    Fiocchi Specialty Ammo 9mm Rimfire #9 Shot Shotshell Box of 50
     
  6. Jarhead1987

    Jarhead1987 XDTalk 1K Member

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    Thanks! I was short on time. Uh oh, time to get back to work for me! LOL
     
  7. mhen

    mhen XDTalk 1K Member

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  8. cce1302

    cce1302 XDTalk 4K Member

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    there are some crazy obsolete rimfire calibers out there, but I can't think of anything like that in current production.

    Here's a graphic that shows the difference (Rimfire on left, centerfire on right):

    [​IMG]

    "rim" or "center" refers to where the firing pin hits the cartridge
     
  9. McTamney

    McTamney XDTalk 100 Member

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    So if my XD9 is a centerfire than is it okay to dry fire it only when needed? Someone said that it refers to the bullet and not the gun. If that's the case than how does the firing pin know to hit center or rim? I hate to sound like a dumb ass I'm just trying to understand.
     
  10. cce1302

    cce1302 XDTalk 4K Member

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    the firing pin knows to hit where the engineer designed it to hit. your 9mm won't chamber a .22 rimfire cartridge.
     
  11. relsiswb

    relsiswb XDTalk Newbie

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    The firing pin doesn't "know" anything. It is designed to be either a center fire or a rim fire weapon.
     
  12. gsh341

    gsh341 XDTalk 5K Member

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    Most handgun and rifle calibers above 22 caliber are centerfire and the pin is positioned to strike the center of the primer placed in the center of the case. Placing the primer in the middle helps ensure better ignition of the powder.
     
  13. McTamney

    McTamney XDTalk 100 Member

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    I now better understand. Thanks to everyone
     
  14. Kaboom

    Kaboom XDTalk 10K Member

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    Everybody starts out as a dumb-ass, just keep plugging and work your way up :)
     
  15. Soldiernurse

    Soldiernurse XDTalk 100 Member

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    IMHO, this was an excellent thread. Especially liked the reply with graphic of rimfire & centerfire.
     
  16. Carn723

    Carn723 XDTalk Newbie

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    hope this isn't off topic but what stops those .22 rimfires from being dangerous or easily discharged by accident? One time I had a jam on my Walther P-22 and the extractor wouldn't grab hold and eject after a misfire. I could get my self to try any type of removal since it would involve prying on the rim so I brought it to range officer out of fear. He ended up tapping out through barrel with rod. Just curious.
     
  17. Cuda66

    Cuda66 XDTalk 10K Member

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    Same thing that keeps any other cartridge from being dangerous--the user.

    And regarding dry firing--it is not good to dry fire rimfires due to the design of the striker; it will normally end up striking the chamber, and damaging the striker (or, if you do it enough, the chamber eventually).

    In a centerfire, this is not an issue.

    However, it is never a bad idea to buy snap caps for the purpose of dry firing in any caliber.
     
  18. dglock

    dglock XDTalk 3K Member

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    The bullet has nothing to do with whether its rimfire or center fire. The cartridge case is either rim fire or center fire. The same bullet can be fired from either.

    don
     
  19. Carn723

    Carn723 XDTalk Newbie

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    I see your point I suppose I was more referring to the ease of a strike on the rim of the cartridge when trying to remove a jam from the chamber or being lodged and struck by the slide and so forth.
     
  20. gsh341

    gsh341 XDTalk 5K Member

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    In order to make the primer on a rimfire detonate, the case needs to be struck hard enough to dent the rim of the case. This takes a considerable amount of force.

    Also, without the barrel to direct the force of the powder, the case will just split open and the bullet will have little penetration power.
     

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