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Thread: Shot Gun Slugs and Barrel Leading

  1. #1
    Boolit Master


    GregLaROCHE's Avatar
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    Shot Gun Slugs and Barrel Leading

    I was just wondering how things work, as far as barrel leading with shotguns and slugs. Especially, the now becoming very popular, rifled barrels for shotguns. The projectile has to be in contact with the bore, doesn’t it? Do these guns just get lead build up that needs to be cleaned out, or is there something I am unaware of that prevents it?

  2. #2
    Boolit Master
    toallmy's Avatar
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    I have tried a lot of different types of slugs over the years rifled & smooth bore , and have never had a barrel lead problem . Wad , sabot or other type fouling yes but never lead .

  3. #3
    Boolit Master

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    A shotgun slug is typically encased in a wad which acts a sabot, a plastic coating.

  4. #4
    Boolit Buddy mr surveyor's Avatar
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    when the wad peels off the slug early in flight, does that have any detectable affect on the trajectory of the slug?



    jd

  5. #5
    Boolit Master mehavey's Avatar
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    None as far as I've experienced.... whether smoothbore or rifled, commercial or handloaded (using Lyman 525 slug and a WAA12)

  6. #6
    Boolit Master Thumbcocker's Avatar
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    The old foster slugs would lead some in rifled barrels. Also the Brenneke 3" gold ones would lead some, at least in my rifled barrel. The Lyman 525 grIn using a wad cup for a sabot never did lead.
    You'll go far providin' you ain't burnt alive or scalped."

    Will Geer as Bear Claw in "Jeramiah Johnson"

  7. #7
    Boolit Master


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    A rifled slug has rifling bands on it. So how does it engage with the bore if there is a sabot type plastic between the slug and bore?

  8. #8
    Boolit Master mehavey's Avatar
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    slug has rifling bands on it. So how does it engage with the bore ....
    It doesn't. The grooves are supposed to weather-vane in the slipstream.
    Last edited by mehavey; 09-22-2021 at 04:49 PM.

  9. #9
    Boolit Master


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    Quote Originally Posted by mehavey View Post
    It doesn't. The grooves are supposed to weather-vane in the slipstream.
    Ok. That makes sense. Thanks for explaining it.

  10. #10
    Boolit Master mehavey's Avatar
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    ..."supposed"....

    Note: grooves also provide displacement space for lead when squeezed through various chokes

  11. #11
    Boolit Master fastdadio's Avatar
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    Leading does happen in some cases. Minor streaking that is easily brushed out at most, but in my case, I bought a new Weatherby PA459 pump 20ga. smooth bore and a couple boxes of Win Super-X foster type rifled slugs. First outing I shot 10 slugs at 25 yds. to adjust the sights. Those slugs completely lead coated the entire bore from chamber to muzzle. What a mess. Never had that happen before.
    Deplorable infidel

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check