The Firing Line Forums

Go Back   The Firing Line Forums > The Hide > The Dave McCracken Memorial Shotgun Forum

Reply
 
Thread Tools Search this Thread
Old June 17, 2012, 11:35 AM   #1
Kestrel
Senior Member
 
Join Date: October 28, 2001
Posts: 363
Rem 870 Barrel Marking "CB"

I have an older 870 Wingmaster with a vent rib barrel. It is a fixed choke and I was looking at the barrel to see what choke it was. It is marked, "CB". What does this mean?

Thanks!
Kestrel is offline  
Old June 17, 2012, 11:39 AM   #2
Pahoo
Senior Member
 
Join Date: February 16, 2006
Location: IOWA
Posts: 8,783
Guessing

Ah, Cyliner-Bore ??
I say this becaues I have seen "FULL" and "MOD". I have never seen nor read one that said "CB" ......


Be Safe !!!
__________________
'Fundamental truths' are easy to recognize because they are verified daily through simple observation and thus, require no testing.
Pahoo is offline  
Old June 17, 2012, 11:45 AM   #3
zippy13
Senior Member
 
Join Date: August 23, 2008
Location: SoCal
Posts: 6,442
Date code? I depends where the mark is located. C is for April and there's a 26 year cycle in year codes. Might be for April 1955, 1981 or 2007.

Isn't cylinder bore usually abbreviated CYL?
zippy13 is offline  
Old June 17, 2012, 12:09 PM   #4
Virginian
Senior Member
 
Join Date: February 11, 2012
Location: Williamsburg, Va.
Posts: 1,528
It means you are not looking at the choke marking.
Virginian is offline  
Old June 17, 2012, 01:13 PM   #5
Kestrel
Senior Member
 
Join Date: October 28, 2001
Posts: 363
Pahoo and zippy13,

I didn't think it was cylinder bore, since as zippy said, others I've had said "CYL".

I don't see any "MOD", "FULL", "IC" (or, even M, F, IMP) or anything else like I'm accustomed to seeing. I've had a lot of Remingtons and barrels and am perplexed by this one.

As for date code, I'll have to look at it again. It measure 25.5" in length. The receiver is a "V" Wingmaster receiver and it has the old lifter (pre Flex-Tab).

Thanks
Kestrel is offline  
Old June 17, 2012, 01:19 PM   #6
Pahoo
Senior Member
 
Join Date: February 16, 2006
Location: IOWA
Posts: 8,783
Sounds Good !!

Quote:
I didn't think it was cylinder bore, since as zippy said, others I've had said "CYL".
Sounds good to me and if it helps, where I have seen the markings, are at the 11:00 position when looking down the barrel, from the breech on the outside of the barrel. ...


Be Safe !!!
__________________
'Fundamental truths' are easy to recognize because they are verified daily through simple observation and thus, require no testing.
Pahoo is offline  
Old June 17, 2012, 01:24 PM   #7
zippy13
Senior Member
 
Join Date: August 23, 2008
Location: SoCal
Posts: 6,442
I'm not up on the history of 870s; but, I have two barrels for my trap 1100: The original one is marked full and the second one, with screw-ins, is unmarked. Perhaps your gun had an adjustable choke (thus unmarked) and it's had the barrel shortened.
zippy13 is offline  
Old June 18, 2012, 06:20 AM   #8
jmr40
Senior Member
 
Join Date: June 15, 2008
Location: Georgia
Posts: 10,786
Quote:
Perhaps your gun had an adjustable choke (thus unmarked) and it's had the barrel shortened.
For some reason remington 870, 1100, and 11-87's quoted barrel lengths with vent ribs are rounded off to the closest inch. Every factory barrel I've ever measured was like that. A factory 26" barrel will measure 25.5", 28" will measure 27.5". One of the 23" supermag turkey barrel's measured 23.5". It is possble someone shortened a longer barrel and cut it at the post, but it is also quite possible the barrel has not been cut.

Just a guess here but I'm thinking they make all of them to 30"-32" to start then cut them down to whatever final length they want before threading for choke tubes. In order to use the same vent rib on all models they have cut the barrel so that the closest vent rib post matches the end of the barrel.
jmr40 is offline  
Old June 18, 2012, 09:49 AM   #9
zippy13
Senior Member
 
Join Date: August 23, 2008
Location: SoCal
Posts: 6,442
Quote:
Just a guess here but I'm thinking they make all of them to 30"-32" to start then cut them down to whatever final length they want before threading for choke tubes. In order to use the same vent rib on all models they have cut the barrel so that the closest vent rib post matches the end of the barrel.
That's exactly how I made an extra "skeet" barrel for my 1100 Trap: Cut at the rib post and threaded for screw-ins; but, it's still marked "Full."
zippy13 is offline  
Old June 19, 2012, 12:33 AM   #10
Kestrel
Senior Member
 
Join Date: October 28, 2001
Posts: 363
Well, mystery solved. I got out a magnifying glass and found, "IMP CYL" lightly stamped on the barrel. It was much lighter than the rest of the stampings. My middle aged eyes!

Thanks for the help, guys!

Best.
Kestrel is offline  
Old June 19, 2012, 10:05 AM   #11
PetahW
Senior Member
 
Join Date: September 19, 2008
Posts: 4,678
FWIW, a "CB", stamped into the left/rear of a Remington 870 bbl is the Remington Letter Date Code for April, 1981 - it's DOM.

.
PetahW is offline  
Old June 19, 2012, 11:55 AM   #12
Kestrel
Senior Member
 
Join Date: October 28, 2001
Posts: 363
Thanks, PetahW. Did Remington use the Flex-Tab lifter in 1981? I'm curious if this could possibly be the original barrel.

Thanks.
Kestrel is offline  
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 10:31 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2021 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Page generated in 0.06218 seconds with 10 queries