I and Phil Kiner and others have found MANY Browning Screw In Chokes are MISMARKED !! We found many marked 'FULL' to have only .005 or .006 thousandth constriction ! The best way to check them against YOUR inside barrel diameter is with an accurate BARREL GAUGE ! You have been fore warned-----Thank You.
I Think that's why so many Browning choke tubes you see on Ebay -Even if they are marked right, they have the greatest + or - tolerance of any choke made. meaning a + Mod can be the same as a - Improved Mod. Giving you the same choke. Gauged Every Browing I run across. Every shooter need one of you gauges.