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A barrel with a full choke.
18.4
A shotgun barrel with a cylinder bore 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
You have a Baikal Model IJ-18 that was imported from the Soviet Union. If it has a 26 inch barrel it has no choke, a 28 inch barrel has a modified choke, and the 30 inch has a full choke. It is worth about $100 in excellent shape.
on a single shot barrel you must remove the barrel and look at the flat side underneath the chamber to see the choke stamping.
im sure it can be done
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
It is possible to fire a shotgun without a choke, but it is highly not reccomended, and they don't cost that much If you select a barrel with no choke (cylinder) it will cause the pattern to be looser than for a barrel of a shotgun that has a tighter choke. The extreme is "full choke" which keeps a tight pattern out to the effective range. Full choke is typically used for waterfowl. A shotgun that is pressed into double duty (shot for small game and slugs for big game) would work well to have modified choke. Slugs have to be designed to fire through a full choke without blowing the barrel but you will certainly shorten the life of the barrel by firing slugs through a choked barrel. If you can afford an extra barrel, then use a cylinder (no choke) for slugs. Remington and other shotgun manufacturers have interchangeable choke tubes (see link) that allow you to screw in the appropriate choke for your quarry.
http://www.gunshop.com/dgsnos3.htm
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.