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In other words, a choke that patterns "Modified" with lead or bismuth shot would give a "Full" pattern with steel shot. To avoid excessive wear or grooving from occurring within chokes when shooting steel shot, many manufacturers recommend avoiding shooting steel shot in any chokes marked tighter than "Modified", unless the choke tube is ...
Steel, being significantly less dense than lead, requires larger shot sizes, but is a good choice when lead is not legal and cost is a consideration. It is argued that steel shot cannot safely be used in some older shotguns without causing damage to either the bore or to the choke due to the hardness of steel shot.
All Double Automatic shotguns are 12 gauge. Various configurations were available for choke, barrel length, and barrel type.. The Double Automatic was offered in both aluminum and steel receiver configurations, [3] with the aluminum receivers featuring a variety of finish colors. [4]
In 1971, it was offered with the option of the Winchoke screw in choke tube system, supplied with a set of three tubes in improved cylinder (IC), modified (M) and full (F) choke. [15] [f] In 1973, 16-gauge was dropped from the production line. [15] With introduction of the Model 1300, a 3-inch (76 mm) chamber was made standard. [20]
The choke typically consists of a conical section that smoothly tapers from the bore diameter down to the choke diameter, followed by a cylindrical section of the choke diameter. Briley Manufacturing, a maker of interchangeable shotgun chokes, uses a conical portion about three times the bore diameter in length, so the shot is gradually ...
The original 870 models were offered with fixed chokes. In 1986 Remington introduced the new Remington "Rem Choke" system of screw-in chokes (also fitted to Remington model 1100 auto-loading shotguns at the same time). Initially, the Rem Chokes were offered only in 12 gauge in barrel lengths of 21, 26 and 28 in (530, 660 and 710 mm).
The MP-153 is manufactured with fixed choke available as Cylinder, Modified or Full variants, or with screw in chokes with Cylinder, Improved Cylinder, Modified, Improved Modified, Full and Extra Full variants available. Normally there are 3 or 4 chokes included with multi choke variants of the shotgun and a spanner that duplicates as a choke ...
Older models had factory fixed chokes, and steel shot is not recommended for use with those. Some newer 12 gauge and 20 gauge Citori models have back-bored barrels. These are barrels with slightly larger bore diameters. Their purpose is to improve shot patterns by reducing the friction of the shot charge on the barrel wall, while also reducing ...