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 Post subject: Do I need to ream the Barrel on a cylinder bore shotgun?
PostPosted: Sat Feb 01, 2020 4:30 pm 
Utility Grade

Joined: Sat Feb 01, 2020 4:13 pm
Posts: 1
I have a 28" Winchester 97 that I wish to cut down to 20". The walls on the barrel are very thin so for me to have threaded interchangeable chokes I will have to use thin wall chokes. Since the barrel will be cut back to a smooth cylinder bore, will I still have to ream the barrel or can I just start to tap the threads right away?

Thanks.




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 Post subject: Re: Do I need to ream the Barrel on a cylinder bore shotgun?
PostPosted: Sat Feb 01, 2020 6:34 pm 
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Joined: Mon May 19, 2008 8:20 pm
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Location: Williamsburg, Virginia
The barrel will have to be reamed to install choke tubes.

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 Post subject: Re: Do I need to ream the Barrel on a cylinder bore shotgun?
PostPosted: Tue Feb 04, 2020 9:54 pm 
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Joined: Wed Jun 20, 2012 11:31 pm
Posts: 1220
Why ream,just curious?


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 Post subject: Re: Do I need to ream the Barrel on a cylinder bore shotgun?
PostPosted: Tue Feb 04, 2020 10:39 pm 
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Joined: Wed Dec 14, 2005 8:03 pm
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I'm curious . . . . what do you intend to do with a 20 inch barrel shotgun that requires interchangeable chokes?


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 Post subject: Re: Do I need to ream the Barrel on a cylinder bore shotgun?
PostPosted: Wed Feb 05, 2020 8:24 am 
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ohio mike wrote:
Why ream,just curious?

You need at least a slight positive lip where the barrel/bore diameter is smaller leading into the choke tube so wads and whatever does not hang up on the choke tube.

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 Post subject: Re: Do I need to ream the Barrel on a cylinder bore shotgun?
PostPosted: Wed Feb 05, 2020 9:51 am 
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Joined: Mon Oct 08, 2012 8:03 am
Posts: 171
Almost always, if the barrel has a choke, the choke is reamed back to cylinder diameter then the actual reaming and tapping is done to install the choke tube. Regardless of which tube type is installed, the diameter of the threads is larger than the cylinder dimension (ID) of the barrel. In some cases, the ID of the barrel is too great and/or the OD too small so that a standard tube can not be installed. I believe that Brilley (sp?) is able to custom fit tubes to guns with this condition.


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 Post subject: Re: Do I need to ream the Barrel on a cylinder bore shotgun?
PostPosted: Wed Feb 05, 2020 11:29 pm 
Presentation Grade

Joined: Sat Oct 14, 2006 8:35 am
Posts: 931
Location: California
The reamer you use after the bore is reamed to cyl,creates a 3 step "pocket" for the specific brand of choke you plan to use. http://pacifictoolandgauge.com/612-choke-reamers-nopix- then you need the coresponding tap.


Bobcat




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