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  1. #1
    Donít troll me bro!

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    Letís chop a shotgun barrel

    Wanted to convert another old Mossberg 500 12ga hunting shotty into a security 12 but guess what, there ainít no barrels online. I looked. Couple places said they had some, but they lied. Back order twilight zone.
    Had some old plain take offs (pretty dang old) from a few 500ís with steel safeties (told ya) that Iíd already reblued and put up. Two 28in modified choke and a 30in full (which I elected to keep intact due to being a little harder to find)


    Keeping in mind, I wanted them to take the place of a 18.5in security barrel, I measured twice. Then I placed a straight edge on top to mark a spot for the bead, using the original bead as a landmark for....top (dead) bead center and knocked a punch mark in it for the pilot bit. All good, cut it slowly (cut a second, cool a second) with the chop saw. A hack saw would do fine if you take care to square everything up. A tubing cutter would likely not work well, but might be the ticket for marking the barrel squarely for the cut.


    Then a drill and cone shaped abrasive stone for the inner and I made a plug for the barrel so I could spin it with my hand drill while trimming the outer edge of the cut and bevel the muzzle.



    Little blue right quick.


    Drill the new bead hole.


    Mossberg 500 beads have 5-40 threads. They also have a 5/32 inch hex shoulder built in. If you wanna salvage one like I did, briefly put the torch on it and itíll break free with the socket just using finger power. Be careful tho, itís hot.

    When using a tap this small, be aware that itís apt to break with very little pressure, so cutting oil of course and once you get it going and it starts to bind, reverse a half turn, then turn forward til it binds again, then repeat. Run at least half the tap, unless it hits the other side of the barrel first.


    I like red loc-tite. One drop and tighten the bead in the new spot. A tad tighter than finger tight. I used a 1/4 inch drive but babied it.


    And thatís all there is to it. I have about 45 minutes in the entire job.

    Last edited by Magdump; July 28th, 2020 at 04:42 PM.
    Doesnít play well with TROLLS...

  2. #2
    _________

    Premium Member

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    What are you using to ensure the cut is square to the bore?

  3. #3
    Marksman

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    Quote Originally Posted by DAVE_M View Post
    What are you using to ensure the cut is square to the bore?
    If itís free from burrs I donít think it would
    Make much difference if it wasnít perfectly squared. I might be missing something though.


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  4. #4
    Donít troll me bro!

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    Quote Originally Posted by MOTOR51 View Post
    If it’s free from burrs I don’t think it would
    Make much difference if it wasn’t perfectly squared. I might be missing something though.


    Sent from my iPhone using Tapatalk Pro
    I don’t want it to look TOO MUCH like a home job. The chop saw has a vise and you can check the cutting wheel with a square..
    Doesnít play well with TROLLS...

  5. #5
    Marksman

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    Chop that thing with a dull hacksaw and rock on lol


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  6. #6
    Marksman

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    A little filing can also "true up" any cut if needed--- not quite square, so what---it's a scatter gun now!

  7. #7
    _________

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    Quote Originally Posted by Magdump View Post
    I don’t want it to look TOO MUCH like a home job. The chop saw has a vise and you can check the cutting wheel with a square..
    I'm just trying to figure out a way to do it with the 30" 870 barrel I have. It has a taper to it. I don't have a lathe, so anything I do will be a DIY project. I figured I would ream the end by hand, but want to ensure it's cut square. Supposedly Brownells makes a tool for the job, but I haven't looked into it.

  8. #8
    Marksman

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    Quote Originally Posted by DAVE_M View Post
    I'm just trying to figure out a way to do it with the 30" 870 barrel I have. It has a taper to it. I don't have a lathe, so anything I do will be a DIY project. I figured I would ream the end by hand, but want to ensure it's cut square. Supposedly Brownells makes a tool for the job, but I haven't looked into it.
    You could make a series of measurements from the muzzle down. Make marks all the way around the barrel. Then you could cut a little at a time carefully cutting on every mark until you removed the excess length then you could smooth the muzzle a file, reem the bore, and re-smooth the muzzle with Emory cloth.

  9. #9
    Marksman

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    Use a pipe cutter and ring the barrel a couple of times for a straight line, the cut right past the mask, finish up with a grinder to mark

  10. #10
    Marksman

    Gold Member

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    Looks really good !!!
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