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Shotgun: turning a fluted barrel to obtain a true cylinder


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Old 10-24-2016, 04:39 PM   #1
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Default Shotgun: turning a fluted barrel to obtain a true cylinder

Hello,

I have a Mossberg 500 shotgun and it was provided with a fluted barrel. I want to customize the barrel then turn it in lathe to remove metal from the takedown screw which maintain the magazine tube in direction to the chamber.

Could sone tell me if there is a risks.

The goal is to obtain a true cylinder from the takedown screw for about 18cm along the barrel.

You can find many diagrams on google by entering key words "mossberg 500 diagram"

Thank You
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Old 10-24-2016, 05:22 PM   #2
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By "fluted" do you mean rifled internally? Why do this when you can get a cylinder bore barrel for about $80?
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Old 10-24-2016, 07:26 PM   #3
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Welcome to the forum! Stop by "Introductions" and say "Hi"

I googled "mossberg 500 diagram" and did not see any "fluted barrel"
https://en.wikipedia.org/wiki/Fluting_(firearms)

Please clarify if you are looking at lands and grooves inside the barrel (aka: rifling).
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Old 10-24-2016, 11:53 PM   #4
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Mety manana olana eo amin'ny basy nandika teny. Any Etazonia, ny fluted barika manana andalana sokitra ao amin'ny ivelan'ny barika. Moa azo eritreretina ve fa hoe ny hobaboina barika, miaraka amin'ny andalana Hetezo ny ao anatiny ny barika? Tsy miteny Malagasy, ary izaho mpandika teny mampiasa ordinatera fandaharana.
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Old 10-25-2016, 01:10 AM   #5
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I guess C3 answered it clearly
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Old 10-25-2016, 01:25 AM   #6
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KG- ny reninao tafika wers kiraro


The man speaks my language much better than I speak his- and some words just do not translate worth a hoot.
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Old 10-25-2016, 06:22 PM   #7
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Fluted barrel means large diamater at the chamber and gradually diminish to the muzzle. It is the external shape not the internal.

Please dont translate your post in my native language, it becomes unreadable.
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Old 10-25-2016, 07:25 PM   #8
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My opinion?
I would not do that.

That part of the barrel is basically a "chamber" for the shells. That is the part that helps to contain the burning of gases in the shell. There is normally a reason that some parts are thicker than others, and reducing the outside diameter could create a weaker than normal area with some explosive results.

As the load proceeds to the muzzle, the pressures reduce (allows for less metal at the muzzle area.

http://www.mossberg.com/wp-content/uploads/2016/03/12173-Owners-Manual-Pumps-English_V.pdf
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Old 10-25-2016, 07:49 PM   #9
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^^^^^What he said, unless you want your barrel to look like this. The chamber is containing a small explosion, and weakening that wall could lead to little things like missing fingers, eyeballs, etc.

Shotgun: turning a fluted barrel to obtain a true cylinder - Gunsmithing Forum
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Old 10-25-2016, 09:38 PM   #10
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Can you do it? Maybe.

Going towards the chamber 18 cm from the takedown stud is not yet getting into the chamber area. However, much will depend on how much of the barrel material is cut away in the lathe turning. At a minimum, I would suggest that the barrel be proof tested after the machining.

It would not be safe to assume that you could cut as deeply as the bottom of the flutes. The thicker material between flutes serves to reinforce the flutes, and you would be removing that.

Fluted shotgun barrels are relatively scarce in the US, rifled barrels are common. We wanted to be sure we were speaking of the same thing. Sorry about the machine translation. Some languages it works (to some degree), others not as well. Your English is fine- some firearm terms just do not translate well. Glad to have you here.
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