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 Post subject: Flues 20 gauge
PostPosted: Sat Jan 07, 2017 6:26 pm 
Tournament Grade

Joined: Mon Feb 28, 2011 12:19 pm
Posts: 254
Just have a quick question. I recently came into possession of a 1918 Ithaca Flues in 20 gauge. 26" barrels choked 4 and 4 (full and full)??? On the barrel flats , it has the typical serial # on the left flat. On the right flat it is stamped 3 in. The stamping is identical in size and font as the serial number. I have not had a chance to measure the chamber length properly , but a fired 2 and 3/4 " shell fits no problem. This is my first vintage sub gauge , and everything I've found/read/seen says these guns were 2 and 1/2" chambered. I will absolutely not shoot anything other than RST 2 and 1/2" light loads in this gun , just curious as to if this an aftermarket lengthening job.
Thanks in advance for the help




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 Post subject: Re: Flues 20 gauge
PostPosted: Sat Jan 07, 2017 10:24 pm 
Crown Grade

Joined: Sun Dec 09, 2007 11:12 am
Posts: 4119
Location: WA/AK
While the 20-gauge 2 1/2 inch chambering was "standard", all our North American ammunition companies offered longer shells of 2 3/4, 2 7/8 and 3-inch, and our double gun manufacturers would chamber for them on request at no extra charge.

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While the maximum load offered in the 2 1/2 inch 20-gauge shell was 2 1/4 drams of bulk smokeless powder or 18 grains of dense smokeless powder such as Infallible or Ballistite pushing 7/8 ounce of shot. In the 2 3/4 inch and longer shells one could get 2 1/2 drams of bulk smokeless powder of 20 grains of dense smokeless powder such as Infallible or Ballistite pushing that same 7/8 ounce of shot. The main advantage of the longer shells in those days was more/better wadding.

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 Post subject: Re: Flues 20 gauge
PostPosted: Sun Jan 08, 2017 9:52 am 
Presentation Grade

Joined: Wed Apr 18, 2012 7:44 pm
Posts: 779
Location: Ohio
Never thought about the wadding. Good information to know; thanks.


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 Post subject: Re: Flues 20 gauge
PostPosted: Sun Jan 08, 2017 6:57 pm 
Tournament Grade

Joined: Mon Feb 28, 2011 12:19 pm
Posts: 254
Image

here is a picture of the flats with the markings. it weighs exactly 5 lbs 8 ounces.
love the boxes Researcher....


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 Post subject: Re: Flues 20 gauge
PostPosted: Sun Jan 08, 2017 8:07 pm 
Crown Grade

Joined: Wed Dec 21, 2005 11:09 am
Posts: 2107
This is not an Ithaca factory mark so any chamber work was post market.


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 Post subject: Re: Flues 20 gauge
PostPosted: Sun Jan 08, 2017 10:05 pm 
Tournament Grade

Joined: Mon Feb 28, 2011 12:19 pm
Posts: 254
I kinda had my suspicions , but figured I'd ask the experts. This is my first "old" Ithaca , my other being an XL300 semi auto 12 gauge. I have other "classic" doubles but they are all 12's also. Thanks for all the quick informative replies guys. Looks like some online shopping for RST's is in order.




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