A few years back I did alot of testing with my Browning B-80...Shot Federal, Winchester Supreme and Remington...00 Buck and #1..In 3 inch Mag...best choke in MY gun was Improved...with either Federal or Winchester...would put 4-5 00 pellets into 8 1/2 x 11 paper (turned horizontal) at 40 yards...Full choke was worst..scattered and opened pattern....You have to pattern buckshot...Just like turkey loads and sighting in rifle with different loads...Good Luck