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Author Topic: Smoky/Dirty Rounds???  (Read 8491 times)

mnw42

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Re: Smoky/Dirty Rounds???
« Reply #25 on: February 25, 2012, 12:45:30 am »
Quote
Relatively high pressure doesn't seem to lend itself well to lead bullets.

No they don't.  I bought a few hundred (cheap) before I knew better and have been slowly using them up since.
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    Outbreak

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    Re: Smoky/Dirty Rounds???
    « Reply #26 on: February 25, 2012, 01:37:44 am »
    Using up the lead? As in, to get rid of them?

    I use lead for my .40 competition loads, and load them as light as possible to achieve 165 Power Factor for USPSA (175gr @ 950fps or [email protected]). For 9mm, I still have 2000+ 115gr FMJ Montana Golds sitting around. I can load those up to 1400fps+. I don't have a gun that can do that, but the bullets can do it. My shooting buddies have proved it.
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    Re: Smoky/Dirty Rounds???
    « Reply #27 on: February 25, 2012, 07:10:41 pm »
    Yes, gas checks are one answer - another is proper hardness/diameter/lube.  Jacketed bullets make all these headaches go away by eroding your bore faster.
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    Panhead Bill

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    Re: Smoky/Dirty Rounds???
    « Reply #28 on: February 25, 2012, 10:03:07 pm »
    I've apparently got it bass ackwards. So, lower pressure/lower velocity can mean less leading?  Is that correct? 

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    Re: Smoky/Dirty Rounds???
    « Reply #29 on: February 26, 2012, 12:15:41 am »
    It can, yes.  But in most cases, commercial bullets are too hard to seal the bore correctly, and to compound the matter, they are usually on the small side.  This leads to heavy gas blowby, and leading the entire length of the barrel.
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    Panhead Bill

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    Re: Smoky/Dirty Rounds???
    « Reply #30 on: February 26, 2012, 02:40:12 am »
    Oi vey! This stuff is just flying over my head. There's a reason I became a lawyer and not a doctor.

    Seriously, I think some of it is starting to sink in. I really appreciate you taking the time to explain it to me. Thanks!

    Bill
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    RMc

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    Re: Smoky/Dirty Rounds???
    « Reply #31 on: February 28, 2012, 10:54:36 pm »
     Why leading?

      Alloy that is too hard
      + Undersized bullet
      + Low Pressure
      = Gas blow by

      Gas blow by melts minute amounts of bullet lead that builds up in the barrel.

      See: https://wethearmed.com/reloading-and-handloading/how-hard-should-cast-lead-bullets-be/
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    mnw42

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    Re: Smoky/Dirty Rounds???
    « Reply #32 on: March 01, 2012, 02:46:06 am »
    Quote
    usually on the small side.
      That is part of the problem some are .356, but many are .355. 
    Pennsylvania"A government is a body of people, usually notably ungoverned." -Book -- "All war is deception" -Sun Tzu
    Quis custodiet ipsos custodies -- omnia dicta fortiora si dicta Latina -- History is scary - It keeps on coming true! -- Ni!

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