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bullet setback

Discussion in 'General Glocking' started by tacmc6, Mar 9, 2013.

  1. tacmc6

    tacmc6

    92
    0
    Nov 13, 2008
    Indiana
    Does inserting and removing loaded mags, especially .40 cause bullet setback? I am not talking about chambering, just the mags. I understood it was the constant chambering of the same round that possibly caused setback. Thanks.
     
  2. barth

    barth six barrels

    6,411
    466
    Oct 7, 2011
    The Free Zone
    Cambering is the major issue.
    Not mag insertion and removal.
    The slide force cambering the round is what causes most of the problem.

    If you have to re-chamber?
    Use different rounds.
     


  3. ron59

    ron59 Bustin Caps

    6,927
    20
    Jan 3, 2009
    Smyrna, GA
    During mag insertion, bullets aren't affected in any way.

    It's getting slammed out of the mag, into the feed ramp (at a slight angle), and up into the chamber that causes setback.
     
  4. Glock 23 Nutter

    Glock 23 Nutter

    1,712
    258
    Jul 28, 2010
    You can also hand-load the round into the chamber and then hop the extractor.

    Let the slide down Gently on the round, grab the face of the extractor w/ your thumb-nail, pull the extractor out a little bit, and it will jump the case-head and snap into place.

    Sometimes, a Little push on the back of the slide is needed to get it over the hump.

    The same round can be loaded and unloaded indefinitely w/o fear of set-back.

    I load both my G23 and G36 this way. The G23 I keep down-loaded w/ 12, the G36 gets topped off w/ 6.




    Nutter
     
  5. tonyparson

    tonyparson

    5,079
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    Jan 20, 2008
    Dayton, TN.
    I don't Recommend anybody doing this with their Glocks.
     
  6. ipscshooter

    ipscshooter Mostly IDPA now

    1,135
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    Jan 22, 2002
    Near Phoenix, Arizona
    For self defense rounds, make sure to buy cartridges that have a cannelure. Less likely to get set back on multiple chamberings. That's why they put them on "Premium" rounds.

    Just inserting and removing mags doesn't hurt. As said, it is the repeated chambering.
     
    Last edited: Mar 10, 2013
  7. Glock 23 Nutter

    Glock 23 Nutter

    1,712
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    Jul 28, 2010
    OK.

    And...?




    Nutter
     
  8. tonyparson

    tonyparson

    5,079
    9
    Jan 20, 2008
    Dayton, TN.
    There not designed to do that. You might do it 100 times and nothing go wrong or you could do it once and it messes your extractor up. It's your Glock treat how you see fit.
     
  9. Doughnutman_923

    Doughnutman_923

    938
    40
    Jun 20, 2011
    USA
    +1, when you chamber the rounds over and over it can cause bullet setback. Inserting a mag will have no ill effects. I have had some 45acp rounds that just looked like heck because I had chambered them so many times for some reason or another, it will raise pressure in the case and provide better circumstances for a case rupture to occur...but then again, I'm a cheap son of a gun and won't waste a round unless it's utterly useless and I have never had one ruptureon me...yet.
     
  10. Glock 23 Nutter

    Glock 23 Nutter

    1,712
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    Jul 28, 2010
    Thank You. (I was sure it was FUD)

    The extractor is hardened Steel, designed to move in and out against the spring.

    The extractor claw length (depth) is only a fraction of the motion range of the extractor itself.

    The only Forces applied to the extractor are that of your finger to move the extractor claw out, and that of the unloaded recoil spring barely holding the extractor claw against the case.

    It is not forced over, it is hopped over.




    Nutter
     
  11. joeshdog

    joeshdog

    64
    0
    Mar 17, 2011
    Inserting mags over and over does nothing to rounds. Also, I thought Mas got a question about round chambering a while back but couldnt find it. Said factory rounds today are crimped better than in the past so re-chambering the same round isn't as much of an issue as it had been.
     
  12. barth

    barth six barrels

    6,411
    466
    Oct 7, 2011
    The Free Zone
    For some reason, even with quality ammo, I have found 357 Sig
    to be particularly susceptible to bullet set back.

    It's my 357 Sig guns, of which I have four,
    that seem to require special attention.
     
    Last edited: Mar 10, 2013
  13. ron59

    ron59 Bustin Caps

    6,927
    20
    Jan 3, 2009
    Smyrna, GA

    It's pretty common knowledge that you don't want to hand insert a round in the chamber and then drop the slide as you can/will chip that extractor.

    I wouldn't give that advice to anybody.
     
  14. tonyparson

    tonyparson

    5,079
    9
    Jan 20, 2008
    Dayton, TN.
    I agree. Even dropping water will eventually make a hole in a rock and a rock is a lot harder then water.
     
    Last edited: Mar 10, 2013
  15. Black&TAN

    Black&TAN Senior Member

    442
    3
    Jun 13, 2011
    Cleveland, OH
    A new extractor is a relatively cheap part. If you would rather disregard good advice and damage yours, suggest have a couple replacements handy.

    sent via Tapatalk
     
    Last edited: Mar 10, 2013
  16. firefighter4215

    firefighter4215

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    Nov 2, 2009
    Kentucky
    Though I don't agree with his method either, he never said he lets the slide slam home. He specifies that he manually pulls the extractor out to let it ease over the rim. He probably won't break his gun this way.

    If you chamber each round in the mag once, plus the one in the pipe, you can shoot those rounds at the range as target ammo. That helps keep fresh ammo in the gun, minimize the risks of setback, and let you practice with some carry ammo. Just a thought. I hope that made sense.
     
  17. jthrelf

    jthrelf

    436
    0
    Sep 14, 2012
    PA
    it's very easy to just keep a pattern in your SD ammo box and go through a chambering of each round a few times before finally just popping them off one day

    i dont chamber/unchamber everyday, so that method will last for a long time
     
  18. clarkz71

    clarkz71

    1,611
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    Aug 24, 2012
    South Florida
    Glock extractors have been made from MIM the last few years.

    No more hardened steel.
     
  19. SCmasterblaster

    SCmasterblaster Millennium Member

    18,233
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    Sep 24, 1999
    Hartford, Vermont
    What is MIM?