The 12 ga. Briley chart is my go-to reference. I memorized the .005" steps many years ago. It has worked well for me, and since i shoot CompNChoke tubes in most of my screw-choked guns, it matches their designations, too.

If Briley's chart is right for .410, what would they call the "Full" choke tube for my FAIR Iside that has .034" ? shocked

SRH


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