Pennsylvania Firearm Owners Association
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  1. #1
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    Default Shotgun Wall Thickness Gauge

    Good evening everyone!

    Quick question, are there any smiths within reasonable driving distance of southeastern PA who have wall thickness gauges? I don't particularly want to shell out $500 for a gauge and am happy to pay someone to do measurements for me! If not, I will probably buy one since I have a weird addiction that requires I buy a vintage SxSs every few months. In any case, I currently have a few vintage shotguns that I want to ensure haven't been honed to ludicrous levels and will blow up on my hand/face if I decide to fire them. Thank you!
    Opera Non Verba

  2. #2
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    Phoenixville, Pennsylvania
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    Default Re: Shotgun Wall Thickness Gauge

    You could just buy a cheap set of telescope gauges and a micrometer. Subtract the I.D. from the O.D., and divide by 2.

  3. #3
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    Levittown, Pennsylvania
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    Default Re: Shotgun Wall Thickness Gauge

    How does one ascertain the original thicknesses from chamber to muzzle? What amount of thinning is allowable?
    There are only two kinds of guns. Those I have and those I want.

  4. #4
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    <( ' . ' <), Pennsylvania
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    Default Re: Shotgun Wall Thickness Gauge

    would this honing have been done to hide/remove rust and pitting or for some perceived performance benefit like weight savings or spread?
    i've heard of honing a cylinder... but never when that cylinder is actually barrel.
    "These are the times that try men's souls" - Thomas Paine
    "Live free or die. Death is not the worst of evils” – John Stark

  5. #5
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    Default Re: Shotgun Wall Thickness Gauge

    Quote Originally Posted by ScorpioIM View Post
    You could just buy a cheap set of telescope gauges and a micrometer. Subtract the I.D. from the O.D., and divide by 2.
    That's not a bad idea. I hadn't thought of using a telescope gauge for the ID. The OD would definitely not be a problem with a micrometer. I may have to shop around for a cheap gauge. Even at full cost, a telescope gauge is significantly cheaper than a wall gauge.
    Opera Non Verba

  6. #6
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    Default Re: Shotgun Wall Thickness Gauge

    Quote Originally Posted by Bang View Post
    How does one ascertain the original thicknesses from chamber to muzzle? What amount of thinning is allowable?
    You can't really know the original thicknesses, but the Brits have some standards for minimum thickness which is then measured at different distances from the chambers. For a 12 gauge .020 inches is considered okay for most parts of the barrel. Ideally you want more than that. The chamber obviously has to be thicker as well.
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  7. #7
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    Default Re: Shotgun Wall Thickness Gauge

    Quote Originally Posted by fallenleader View Post
    would this honing have been done to hide/remove rust and pitting or for some perceived performance benefit like weight savings or spread?
    i've heard of honing a cylinder... but never when that cylinder is actually barrel.
    The honing is usually done to remove rust and pitting or to reduce weight to sleeve a gun. My main concerns are honing that was done close to the chamber or if someone improperly reamed out a 2.5 inch chamber to a 2.75 inch chamber. If too much metal was removed lengthening a chamber or honing I'm not going to shoot the gun even with the black powder or low pressure reloads I use
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  8. #8
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    Default Re: Shotgun Wall Thickness Gauge

    Tie it to a tree and pull the trigger with a rope.
    There are only two kinds of guns. Those I have and those I want.

  9. #9
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    Default Re: Shotgun Wall Thickness Gauge

    Quote Originally Posted by Bang View Post
    Tie it to a tree and pull the trigger with a rope.
    Been there done that but... I'd at least like a nice wall hanger if a couple of these don't work out
    Opera Non Verba

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