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Backboring, Overboring, Vector Pro Etc.

Discussion in 'Shooting Related Threads' started by kolared person, May 12, 2010.

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  1. kolared person

    kolared person TS Member

    Feb 8, 2008
    Why don"t they manufacture new guns with a chamber and a barrel with the same diameter, instead of all these pattern improving gimmicks?
  2. timb99

    timb99 Well-Known Member

    Jan 29, 1998
    Beijing, China
    Chamber diameter for a 12 gauge is about 0.800 inches.

    A "standard" 12 gauge bore diameter is 0.729 inches.

    0.800 is bigger than the standard bore diameter of a 10 gauge, which is 0.775 inches.

    I think part of the answer is cost.

    Tooling and machining are already set up to do it the old way, so there would be cost associated with retooling.

    Plus, it takes more metal to make a larger diameter barrel, and that would add to the price of the gun.

    Then, also, you have the concern that a wad made for a 0.729 inch barrel might not seal properly in a 0.800 inch barrel. Though there is some evidence, as shown by the short sub-gauge tubes like sidekicks and chambermates that indicates performance would be no problem.
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