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Why do they call it "backboring"?

Discussion in 'Shooting Related Threads' started by rick979, Apr 26, 2010.

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  1. rick979

    rick979 Active Member

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    Why don't they call it boring or overboring instead of backboring? Is there a technical difference?
     
  2. halfmile

    halfmile Well-Known Member

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    Green Bay Wisconsin
    Why do they call it

    Originally the idea was to make the choke more effective, and the area in "back" of the choke was bored larger. No screw chokes back then, and this was how you got more constriction.

    The choke size stayed the same but the bore was larger, hence the choke got tighter.

    I saw this done on a Sunnen honing machine with a VERY long mandrel once.

    So anyway boring the back end of the barrel was known as "back" boring.

    HM
     
  3. Neil Winston

    Neil Winston Well-Known Member

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    Why do they call it

    Northwest barrelsmith is credited with inventing the word "backboring" if not the process. He meant enlarging the bore and choke, or at least that's what he did.

    He also did a lot of other stuff, including making the ATA refine it's rules about the gauge of guns. When he invented the "Baker Big Bore" with a tube in the inside about the diameter of a conventional 10-gauge, the ATA made clear that when it talked about 12 gauge guns (the maximum) it was defined by chamber size, that's all.

    Neil
     
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