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Unread 09-29-2017, 12:20 PM   #1
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Thanks James. I think those numbers might be a bit high. Several people in the past that have measured that way without a gauge get really high numbers. A wall thickness gauge I think is a must as you can get inside near the ribs. Thank you for taking the time to measure!
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Unread 09-29-2017, 12:30 PM   #2
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Sorry, forget to divide by 2. I have added right numbers.
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Unread 09-29-2017, 01:01 PM   #3
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Ok, that makes sense. Those are good numbers. Your bores have probably not be honed or polished. Nice gun!
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Unread 09-29-2017, 02:01 PM   #4
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James, you didn't say what frame size your DH is, but I think your numbers are just about right for a 2 Frame gun.
Coming up with a reasonably valid number by halving the difference of the ID and OD, will only be reliable at the chamber, forcing cone and perhaps a few inches. Generally, you're more likely to find that, due to striking further down the barrels, the concentricity is less assured. I've seen differences of several thous between one side and another, or top and bottom, at the last 10" or so, then becoming more concentric around the beginning of the chokes.
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Unread 09-29-2017, 02:20 PM   #5
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The frame size is 1 1/2 , the barrels are original 26" and nothing has been done to them as far as I can tell.
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Unread 09-29-2017, 02:26 PM   #6
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In measuring two 1 1/2 frame guns, I find .096", and .092" at the forcing cones. Not a huge drop on two 1 frame guns.
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