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  1. #21
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    Default Re: Minor Rust in barrel

    Quote Originally Posted by KK20 View Post
    CZ steel used is good quality , it is something else I would guess.
    Probably there's been some corrosive component involved with the ammunition and/or some environmental factor.

  2. #22
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    Default Re: Minor Rust in barrel

    I had ask for details of the ammo used.
    live out your imagination , not your history.

  3. #23
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    Default Re: Minor Rust in barrel

    Not surprising really. Copper fouling in a steel barrel; damp environment. Google "galvanic corrosion".

  4. #24
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    Default Re: Minor Rust in barrel

    Quote Originally Posted by AK-Gunner View Post
    No, your science is invalid: pitting lessens friction since it's a point where the bore is ever so slightly larger. Pressure peaking will never happen with "pitting" and there's no danger shooting a weapon with pitted barrel, it doesn't usually even affect practical accuracy.

    Please, no more gunstore myths

    Just like that?

  5. #25
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    Default Re: Minor Rust in barrel

    Quote Originally Posted by A-R View Post
    Just like that?
    What seems to be the problem?

  6. #26
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    Default Re: Minor Rust in barrel

    Quote Originally Posted by AK-Gunner View Post
    No, your science is invalid: pitting lessens friction since it's a point where the bore is ever so slightly larger. Pressure peaking will never happen with "pitting" and there's no danger shooting a weapon with pitted barrel, it doesn't usually even affect practical accuracy.

    Please, no more gunstore myths
    **************
    ***********************
    another Myth just created - pitting lessens friction since it's a point where the bore is ever so slightly larger. Pressure peaking will never happen with "pitting

  7. #27
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    Default Re: Minor Rust in barrel

    Here's one article about "serious pitting" and what it does to accuracy. And no, the pistol didn't blow up.

    https://www.shootingtimes.com/editor...accuracy/99084


  8. #28
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    Default Re: Minor Rust in barrel

    Quote Originally Posted by treeman View Post
    another Myth just created
    Nope, just physics

  9. #29
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    Default Re: Minor Rust in barrel

    Quote Originally Posted by AK-Gunner View Post
    Nope, just physics
    *****
    a rough bore has less resistance than a smooth bore / hence lower pressure ?....
    Marelize waar is jy ?

  10. #30
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    Default Re: Minor Rust in barrel

    Please my friend treeman, my Afrikaans is still so weak that to prevent misunderstandings I'll have to ask you to use either English or Finnish. Swedish and German will also do fine.

    We are talking about "serious pitting", whatever the word "serious" means to a person, but as you do understand, steel can't grow by itself, but as per the laws of entropy the barrel is more or less a closed system which can only degrade. That said, the bullet is interacting with the barrel and it adds some material to the bore, but more about it a bit later.

    The assertion I'm challenging is
    Quote Originally Posted by Ds J View Post
    ... but serious pitting can be dangerous.
    which to my knowing doesn't have any real life basis.

    Pitting is in essence missing metal. Missing metal in a gun bore (basically a smooth tube or with grooves) makes the barrel for the lack of a better term, less tight, usually unevenly so which may or may not measurably affect accuracy. The pressure behind the bullet is in effect relative to the tightness of the bore, since tighter the bore - more resistance to to the movement of the bullet, hence when the diameter of this hole grows the resistance lessens and even if there might be fluctuations on the pressure curve, the peak pressure drops, more so if there's lots of blow-by caused by the less than perfect bullet to barrel seal.

    However, if we are talking about slight pitting, there is a possibility that these pits on the bore will resist the movement of the bullet scraping jacket material thus gradually filling up with the said material, there will be a momentary peak in the pressure curve, but the "peak" will be negligible or impossible to even measure.

    So no, there is no scientific basis nor known to me instances of bore pitting maiming or killing people.

    Please, prove me wrong and I'll be happy to stand corrected

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