Chokes are screwed in the end of the barrel of shotguns to improve performance. Choke tubes shape the spread of the shot. Depending on what type of tube you have you can modify your spread pattern tighter or have a larger spread depending on what you want. In my opinion you don’t want to use full lead chokes with steel shot. Having a full choke will make your BB constriction very tight tight. An Improved Cylinder for a skeet choke is best for ducks and geese that are close. If the birds are farther out, a modified choke tube is better.
Cades Outdoor Opinions 