wayne back when I used to shoot pumps my 12 ga I had custom chokes in was xxxx full or .650 which is .080" constriction . had a 10 ga .7000" choke which is .080" or so . got some pretty crazy shots with those tight chokes .
you could probably use a caliper to measure the chokes using the .835" bore diameter though it probably varies . Cant wait too see the scott once you get it restored . makes me want to get my barrels done too!
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