How to tell what choke tube you have?

A choke tube is a device placed inside the barrel of a shotgun that regulates how much shot is released at any given time. Choke tubes come in a variety of constrictions, which are measured in terms of choke percentage. The higher the choke percentage, the more restricted the shot will be as it leaves the barrel.

There are several ways to determine which choke tube you have. One way is to measure the outside diameter of the barrel and then match it with one of the following diameters: .700″, .715″, .740″, or .765″. Another way is to look at the markings on the choke tube itself. The markings will indicate what percentage of constriction it provides. For example, “Cylinder” means there is no constriction, while “Improved Cylinder” (IC) means the choke provides 40% constriction.

You can also determine the choke percentage by measuring the inside diameter of the barrel at the muzzle end. To do this, you’ll need a bore micrometer or caliper. Once you have the measurement, you can match it up with the following chart:

Barrel Diameter (in.) -Choke Percentage

.730″ -0%

.735″ -5%

.740″ -10%

.745″ – 15%

.750″ – 20%

So, for example, if you have a .740″ barrel, you know that the choke provides 10% constriction.

Choke tubes are made from a variety of materials, including steel, aluminum, and brass. The most common type of choke tube is the steel choke tube. Steel choke tubes are less expensive than other types of choke tubes and are more durable.