Choke constriction info.
I am checking out the bore diameter on a 12ga 30" GH damascus barreled gun using a Skeets Gun Shop dial indicator bore gauge.
Here are the following measurements. Both barrels seem identical within about .0015 at all of the increments.
Increments are inches from the end of the muzzle.
4"- .051
3"- .049
2"- .048
1"- .039
0"- .022
Leaving me with a choke of .029
Is there a constriction chart that will give me the ballpark equations for various constriction ranges? IE, .029= Mod, Full etc.?
Do the above constrictions and intervals sound realistic for an untouched bore as far as the bores not being honed etc.?
Checking wall thickness is next on the agenda.
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