How do you use adjustable choke on shotgun?

Answer 1

Many of the adjustable chokes are adjusted by turning the choke. (If it does not turn with moderate hand force, it is probably gunked up with carbon- let soak in a good powder solvent for a day or two and try again). They work by squeezing movable strip closer together, or further apart- the tighter the squeeze, the tighter the choke. A tighter choke holds the shot column together longer, and gives a smaller pattern that has greater range.