My chokes
Barrel dia .624
Full dia .595
Mod dia .611
Imp cly dia .616
Carlsons BC MID .601
I picked up a new Franchi Affinity 20 ga the other week at spent a hour or so at the range doing some patterning. All loads tested shot good from Winchester 2 3/4'' 3/4oz Drylock #4, Estate 3" 1oz #2 and #4 and Remington 3" 1oz #4. The only load that didnt pattern that well was Hevi metal 3'' 1oz #3. The Hevis shot under 50% pattern at 30 and 40 yards.
Anyways, I've patterned a lot of 12 gauge loads but never seen any this tight or high of % from chokes that are bigger than they are supposed to be. I know my bore at .624 is bigger than it should be by .004 but still 65%+ with a IC at 40 yards is tight. I wanted a 20 gauge for a while. Most ducks I shoot are under 30-35 yards. Any ideas on getting this to open up some?