Difficult to clean barrel

This is a discussion on Difficult to clean barrel within the Defensive Rifles & Shotgun Discussion forums, part of the Related Topics category; Okay.... I need a bit of advice on a VERY difficult to get clean 12 Guage Mossy 500 24" rifled slug barrel. It was a ...

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Thread: Difficult to clean barrel

  1. #1
    Member Array Flippinstk's Avatar
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    Difficult to clean barrel

    Okay.... I need a bit of advice on a VERY difficult to get clean 12 Guage Mossy 500 24" rifled slug barrel.
    It was a present from my "WONDERFUL WIFE" for Xmas.
    I "tried" to clean this puppy for 2 1/2 hours today and could not for the life of me get the residue out of the inside of the barrel. Hopes #9, parts cleaning solution, transmission fluid and Mobil Synthetic were all tried.... used a 10/12 guage brass brush, used a cotton bore mop, used a swag with patches. Literally non-stop for 1 1/2 hours. I made some progress but the bore is still not spanky clean. It looks like a residue from 4 inches past the breach to about 2 inches before the vent holes. Everytime I see stuff looking like it breaks loose I'll run a dry patch down the bore and it looks just like it did before. This is my first shotgun (pistol shooter) and don't know if shotguns normally come this way from the factory. Oh yeah, by the way the 28" smooth bore came clean in 2 passes. Has anyone encountered anything like this before or ave a suggestion on cleaning solvents that wont harm the finish or bore?

    Thanks in advance.
    Alex G.
    S&W M&P .45
    Virginia Beach, Va.
    Senior Chief Petty Officer, RETIRED, USN
    Certified NRA Pistol Instructor
    NRA Range Officer

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  3. #2
    Distinguished Member Array Tally XD's Avatar
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    What about using it, I Mean actually putting some slugs through it, and see if it shines up? It is brand new isnt it?
    I am consistently on record and will continue to be on record as opposing concealed carry.
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    Member Array Flippinstk's Avatar
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    yep... brandy new. And Thats what I was giong to do tomorrow at the range (indoor) as long as I can shoot slugs there.
    Alex G.
    S&W M&P .45
    Virginia Beach, Va.
    Senior Chief Petty Officer, RETIRED, USN
    Certified NRA Pistol Instructor
    NRA Range Officer

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    Distinguished Member Array Rcher's Avatar
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    Try Break-Free Bore Foam Cleaner. You spray the foam into the bore and let it stand for 15 mins. After the 15 mins, run a bore brush through starting from the breach pushing out the muzzle. Follow up with a swab and Break Free w/CLP. You are seeing cosmoline in the barrel. You need a solvent and a brush to clean it off.

    If you still have residue, repeat as necessary.

    "Government is not the solution to our problem; government IS the problem". - Ronald Reagan 1981

  6. #5
    Member Array Flippinstk's Avatar
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    Rcher,

    Plug the end of the barrel to keep it in there, or will the foam stay put?
    Alex G.
    S&W M&P .45
    Virginia Beach, Va.
    Senior Chief Petty Officer, RETIRED, USN
    Certified NRA Pistol Instructor
    NRA Range Officer

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    Distinguished Member Array Rcher's Avatar
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    Stick the tube of the cleaner into either end of the barrel, when the foam comes out the opposite end, its full. It will stay there until you push it out with a rod.
    "Government is not the solution to our problem; government IS the problem". - Ronald Reagan 1981

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    Senior Member Array darkvibe's Avatar
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    I have a new 935 and had the same problem.

    I tried everything. Gunslick foaming bore cleaner, hoppes semi-auto solvent. I ended up having the best luck with blue armor stuff. It comes in a tube and smells like amonia. I scrubbed the hell out of it with a bronze brush and that stuff which made lots of the stuff come out. Bronze brush and a cordless drill with blue armor cleaner was the next step. Of course don't do that if it's a rifled barrel. The drill worked alright. Still not perfectly clean but good enough for now.

    I have no idea what mossberg uses in the barrels but I won't buy another one between that and rust on the choke threads inside the barrel.

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    VIP Member Array Superhouse 15's Avatar
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    Foam

    I use the foam on all kinds of stuff, including super high round-count rental guns at an indoor range. Give it a try.

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    Senior Member Array jualdeaux's Avatar
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    Buy an ultra-sonic cleaner large enough to drop the whole barrel in it.

    Hey! He asked for suggestions on how to clean it. He didn't say they had to be economical.
    Bend the knees, smooth is fast, watch the front sight.

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