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  1. #1
    First Class
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    Oct 2011
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    S.E. Missouri
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    10

    Need to know how to measure chamber length.

    I have a Fox Sterlingworth 20 ga made in 1926 and would like to know, is there is a way to measure the chamber length without taking it to a gunsmith???
    Last edited by Hardcash; December 4th, 2011 at 05:56 PM.

  2. #2
    Eagle
    Join Date
    Oct 2007
    Location
    Maine
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    808
    Is it a 12?

  3. #3
    Take a fired shell, grind the rim off the brass and put it in the gun backwards, measure what sticks ot of the chamber if anything. this works well as a cheap chamber gage, or buy a guage, or go to a gmsmith and have him measure it.

  4. #4
    First Class
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    Leon670, It's a 20 ga.
    Frank Danner, thank you. I will give it a try.

  5. #5
    Eagle
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    Oct 2007
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    You could also take a piece of hard plastic that is an inch or so longer than 2 3/4" and trim it down to a tapered wedge shape. Make sure the large end is the same width as the diameter of the chamber. Insert the wide end first until it stops and mark where it is even with the breech end of the barrel and measure it.
    Last edited by Leon670; December 2nd, 2011 at 10:38 PM.

  6. #6
    
    
    Insert a new wad with the shot cup down into a once fired hull. Gently insert it into the barrel until you meet resistance. If it goes in all the way it has a 2 3/4 inch chamber. If it stops short measure the distance from the rear of the breech to the head of the hull and subtract the measurement from 2 3/4.

    Standard 12 gauge Fox chambers of guns made by Savage after 1930 were advertised as having 2 3/4 inch chambers but numerous Foxes produced after 1930 still retained 2 5/8th inch chambers. Fox guns in 16 gauge have 2 9/16th chambers until about 1936 -37 after 1937 16 guage guns were produced with 2 3/4 inc chambers and are so marked on the left barrel. Fox guns with short chambers sent back to the factory for repair routinely had the chambers lengthened and were re-proofed and the barrels roll stamped "2 3/4 inches" by Savage in the mid 30s.

  7. #7
    Star
    Join Date
    Feb 2008
    Location
    United Kingdom
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    66
    Hi Hardcash

    The simplest way is a picture of the chamber. Take a piece of pipe metal or plastic that will loosely pass down the bore and cut it roughly in half for about 4 inches. Now the simple part fill the half pipe with any of the following:- Children’s play dough. Soft modelling wax. Dental Alginate but that is starting to become expensive for what you want. I am sure there are a lot of other mouldable materials you can use. I have used Instant mashed potato mixed to dough consistency. Make sure the barrel and chamber are well oiled WD 40 works well place the pipe in the bore and push it to one side then reverse and remove it what you will have is a relief picture of a portion of the guns chamber and further if you need that as well, you can now put a ruler next to it and measure. Clean barrels well after though!

    Damascus

  8. #8
    Or just buy one of the brass chamber gauges that Galazan sells. They're pretty accurate, especially on the chambers of American guns.

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