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Old March 13, 2011, 11:37 PM   #1
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Shotgun choke codes

Is there a master list of choke codes for American and foreign shotguns for the before-choke-tubes era anywhere?


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Old March 14, 2011, 01:41 PM   #2
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No, you have to find a reference here and a reference there, like the Blue Book. Here's a start.
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Old March 14, 2011, 01:42 PM   #3
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One more for choke tubes.
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Old March 22, 2011, 02:36 PM   #4
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The Hallowell chart is a good reference; otherwise, pre-choke tube guns, if not marked as shown, might have barrel dimensions stamped on the barrels - one indicating the bore size, the other the muzzle diameter - many times this was done in MM's, so you might see something like 18.5 stamped - making it a 12 gauge with approximately bore size of .729 - fairly common dimension. Then you might find on the same barrel a stamping like 18.0. When converted, it gives a dimensional difference of .020, or commonly known as Modified
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