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

Bullet clearance inside of mag?

Discussion in 'Handguns: Autoloaders' started by Steve H, Dec 8, 2012.

Thread Status:
Not open for further replies.
  1. Steve H

    Steve H Member

    Joined:
    Nov 10, 2006
    Messages:
    1,328
    Location:
    Southern Utah
    Hope this is in the correct forum, if not please move.

    I have a new Springfield XDs (45) and three times in about 250 rounds fired the slide has stayed open. At first I thought this may be just a "break in" issue but last night I started thinking about cartridge OAL in relation to the inside of the mags. Went out to the shop today and started to try to figure out how much clearance there is between the tip of a round and the inside of the front of the mags. I do have any round feeler gauges so I made up a long dummy round and kept "shrinking" it until it just barley would load into the mag. What I came up with is almost .020" clearance. The ammo I was having a problem with is Federal Bulk. I measured a bunch of it this morning and it come in at mostly 1.267. The dummy round would not load unit I squeezed it down to 1.285. I guess my question is................is .017" clearance enough?

    I have not had any problems with my reloads, they are 1.255" and all factory HP ammo feeds with no problems.
     
  2. rcmodel

    rcmodel Member in memoriam

    Joined:
    Sep 17, 2007
    Messages:
    59,082
    Location:
    Eastern KS
    Mil-Spec 230 grain FMJ-RN ball ammo is loaded to 1.266" - 1.271".

    SAAMI Max length for any bullet shape is 1.275".

    The gun & magazine should work with ammo that length or shorter.

    rc
     
  3. 56hawk

    56hawk Member

    Joined:
    Mar 29, 2011
    Messages:
    1,298
    Not sure I follow. What do you mean by "the slide has stayed open"?
     
  4. Steve H

    Steve H Member

    Joined:
    Nov 10, 2006
    Messages:
    1,328
    Location:
    Southern Utah
    RC, is there a spec or standard for the amount of clearance from the tip of the Mil-Spec ammo to the mag? I guess the question is, could Springfield have made the mags too short from front to rear?
     
  5. Steve H

    Steve H Member

    Joined:
    Nov 10, 2006
    Messages:
    1,328
    Location:
    Southern Utah
    The slide stayed back as if the mag was empty.
     
  6. 56hawk

    56hawk Member

    Joined:
    Mar 29, 2011
    Messages:
    1,298
    Usually that is caused by your thumb accidentally touching the slide release lever. You might want to try changing your grip and see if that helps.
     
  7. rcmodel

    rcmodel Member in memoriam

    Joined:
    Sep 17, 2007
    Messages:
    59,082
    Location:
    Eastern KS
    Yes.

    Then you have .010" extra clearance over the longest allowable SAAMI max length.

    That should be plenty.

    rc
     
  8. Steve H

    Steve H Member

    Joined:
    Nov 10, 2006
    Messages:
    1,328
    Location:
    Southern Utah
    RC Thanks for the info, I wish I knew just a drop of what you do.

    56hawk I was just thinking the same thing or maybe.......I'd hate to say it but "limp wrist"

    The gun is new with only ~250 rounds through it. I think it's going to take some range time and maybe some adjustments on my part.
     
  9. bds
    • Contributing Member

    bds Member

    Joined:
    Jan 10, 2010
    Messages:
    14,331
    Location:
    Northwest Coast
    To check whether you are unintentionally pushing up the slide release with your right thumb, try shooting the pistol with your left hand. If you can't duplicate the slide locking back with your left hand, you are pushing up the slide release unintentionally.
     
Thread Status:
Not open for further replies.

Share This Page