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09-29-2017, 12:20 PM | #3 | ||||||
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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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09-29-2017, 12:30 PM | #4 | ||||||
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Sorry, forget to divide by 2. I have added right numbers.
__________________
" May you build a ladder to the stars climb on every rung and may you stay forever young " Bob Dylan |
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09-29-2017, 01:01 PM | #5 | ||||||
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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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09-29-2017, 02:01 PM | #6 | ||||||
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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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The Following User Says Thank You to edgarspencer For Your Post: |
09-29-2017, 02:20 PM | #7 | ||||||
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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.
__________________
" May you build a ladder to the stars climb on every rung and may you stay forever young " Bob Dylan |
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The Following User Says Thank You to James L. Martin For Your Post: |
09-29-2017, 02:26 PM | #8 | ||||||
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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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The Following User Says Thank You to edgarspencer For Your Post: |
09-29-2017, 03:19 PM | #9 | ||||||
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I have 79355 a 0-frame sixteen with .064" and .066" at the front of the chambers, beginning of the forcing cones that were measured by Oscar Gaddy and he pronounced them as "probably safe to shoot with loads under about 7,500 p.s.i."
I've taken a bunch of grouse and a couple of woodcock (and about 50 rounds of skeet) with it using 2.5" RST Falcon Lites. .
__________________
"I'm a Setter man. Not because I think they're better than the other breeds, but because I'm a romantic - stuck on tradition - and to me, a Setter just "belongs" in the grouse picture." George King, "That's Ruff", 2010 - a timeless classic. |
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The Following User Says Thank You to Dean Romig For Your Post: |
09-29-2017, 04:24 PM | #10 | ||||||
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My 12 ga 1 frame twist barrels were measured by Mr. Hosford utilizing his equipment. The wall thickness at the end of the chambers was .115 and at the end of the forcing cones .090. Minimum barrel wall thickness was .030 in both tubes.
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