A barrel with a full choke.
The choke is a way of narrowing the barrel. It is designed to keep the shot in a tighter pattern. A full choke is supposed to increase the effective range of the weapon.
A shotgun barrel with a cylinder bore choke.
Nominally the inside diameter is about 0.72 inches, but will vary depending on choke.
Being a double barrel has no bearing on what the choke COULD be. While MOST are full/ modified. it could be any, or none. Shotgun ChokeYardageShotgun Choke Restriction Diameter difference between bore and shotgun chokeCylinder< 200Skeet22.5.005 of an inchImproved Cylinder25.010Light Modified30.015Modified32.5.020Improved Modified35.025Light Full37.5.030Full40 or More.035Extra Full40 or More.040
If you mean a choke bored barrel, it designates the amount of constriction a shotgun barrel has.
They came in various barrel lengths and choke combinations. If it is not marked on the side of the barrel, you will have to pattern the shotgun to determine the choke
You can pretty much bet on full or modified, but the actual determination of choke is made by comparison the inside diameter of the muzzle to the inside diameter of the barrel before the bore. sales@countrygunsmith.net
The Choke of a shotgun is the amount of barrel restriction at the muzzle end which affects the shot pattern. A full choke will keep the spray pattern of the pellets closer together farther out than if the barrel was not restricted at the muzzle. If there is no restriction at the muzzle, the choke is said to be cylinder choke or cylinder bore.
It is called "choke". lcj
Choke.
They probably denote what choke the barrel has.