To properly ascertain the chokes of your barrels, you need to know the diameter of the bore before the choke, and the diameter of the muzzles. The difference, in thousandths, would be a more accurate way to determine the choke. The pellet numbers can also be used to verify what chokes the barrels have. You would have to know how many ounces of shot or number of pellets were used in the test loads. There are others that are much more knowledgeable than I on the subject. They will jump in soon. Cheers!
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GMC(SW)-USN, Retired
'Earnest Will'
'Desert Shield'
'Desert Storm'
'Southern Watch'
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