Shotgun Chokes

A brief description of chokes...

UK

American

European

Range in Yards

Shotgun Choke Restriction
Diameter difference between bore and shotgun choke
Cylinder or Open Cylinder CL < 20 0
  Skeet   22.5 .005"
¼ Improved Cylinder ++++ 25 .010"
  Light Modified   30 .015"
½ Modified +++ 32.5 .020"
¾ Improved Modified ++ 35 .025"
  Light Full   37.5 .030"
Full Full + 40 or More .035"
  Extra Full   40 or More .040"