Dark Bore
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Thread: Dark Bore

  1. #1

    Dark Bore

    Picked up a M1 Garand on the cheap yesterday. Rifle is pretty rough but can be salvaged. The bore is very dark, almost black. Anybody have a good system for bringing the bore back to at least fair? Thanks

  3. #2
    Join Date
    Sep 2007
    Gray Court, SC
    Sounds like someone re-parkerized the barrel and didn't plug the bore. Run some new bore brushes through it and see what happens. You need to get the bore gauged and the chamber gauged to make sure it's serviceable. Most gunsmiths that work on M1's will have the gauges. There are a lot of Garands out there that have been shot out and are not safe to fire.
    USAF Retired, CATM, SC CWP, NH NR CWP, NRA Benefactor
    To preserve liberty, it is essential that the whole body of people always possess arms, and be taught alike, especially when young, how to use them... -- Richard Henry Lee, 1787

  4. #3
    Join Date
    Jan 2008
    Florida Panhandle

    Exclamation If the bore gauges check fine...

    you will need to use lapping compound on a lead swedge to get that stuff out of the bore. after doing so..check the bore gauge again. if it has moved tto unservicable... replace the barrel.

  5. #4
    I have some old rifles with really PITIFUL looking bores that still shoot fine,
    And some newer rifles that have bright, shiny bores that don't shoot worth a darn,
    So you can't go by looks alone!

    Shoot it first, see what it's doing, and lapping of any kind is a last resort!

    Pushing some 'Scotch-Brite' pieces down the barrel might remove some of the 'Problem'...
    I suggest you clean the crap out if it with NYLON brushes and a good strong solvent...

    Brass brushes will react with the bore solvents that really work, so they are out.
    Using a steel brush in a barrel is a pretty silly idea, since steel brushes scratch the bore when they are new,
    Then mat down and do NOTHING to get the crud out of the scratches and rifling.

    Nylon will spring back, doesn't round over as easily as steel, is usually angle cut to give good sharp points that really scrub the tight spots where it counts, and don't react to the solvents you need to use for older rifles we all shoot corrosive ammo and heavy jackets out of.

    And remember, military 'Ordnance' steel is a little 'Darker' color than the bight chromium steel used in a lot of civilian firearms...
    High chromium steel shows up with a little more of a blue tint when it's not highly polished.
    (refraction qualities of the steel, doesn't have anything to do with the actual color of the steel)

    If you REALLY have issues, a very fine grain lapping compound pressed into LOW VELOCITY bullets with copper jackets will be a last ditch effort to save the barrel.
    Fire lapping is ALWAYS a last ditch effort to make a barrel shoot right, not to 'Brighten' the bore,

    So take it out, see how it shoots off the bench before you do much of anything!

    If it shoots like my old M-1 Garand or the old 'O3 Springfield I have laying around here with their 'Dark' barrels, you will be pleasantly surprised!

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