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Most shotgun cartridges are measured in terms of shotgun gauge. Shotgun gauge is determined by the weight of a round lead ball that is sized to fit into its barrel. For example, the barrel of a 12-gauge shotgun is equal to the diameter of a 1/12 of a pound lead ball (0.729 in) and a 20-gauge can fit a 1/20 pound lead ball (0.615 in).
Therefore with a 12-gauge, it would take 12 balls of lead of the same size as the 12 gauge shotgun's inner bore diameter to weigh 1 pound (454 grams). [1] The term is related to the measurement of cannons, which were also measured by the weight of their iron round shot; an eight-pounder would fire an 8 lb (3.6 kg) ball. Therefore, a 12 gauge is ...
The H&R Snake Tamer is also a Snake Charmer like shotgun. Available in 20-gauge or .410-bore/.45 Colt only. These single-shot guns have either a blued finish or an electroless nickel finish with a full-length thumb-hole polymer stock. The right side of the stock is open with storage for three 20-gauge or four .410-bore shotgun shells.
A common method of expressing the amount of constriction is by "points". A "point" is equivalent to 0.025 mm (0.001 in) of constriction of the inner diameter of a choke. Hence, 40 points of constriction would correspond to a constriction of 0.040 inch (≈ 1 mm) in the inner diameter of a choke, corresponding to "Extra Full".
The 4, 8, 24, and 32 gauge guns are collector items. There are also some shotguns measured by diameter, rather than gauge. These are the .410 (10.4mm), .380 (9mm), and .22 (5.5mm); these are correctly called ".410 bore", not ".410-gauge". The .410 bore is the smallest shotgun size which is widely available commercially in the United States.
The M37 came in two styles, Standard and Boy's Model (introduced 1958). Modified choke or cylinder bore was furnished at no extra charge on special order only. The M37 was chambered in the following gauges and shells respectively: 12, 16, 20, 28, and 410 using 2 + 3 ⁄ 4-inch, 2 + 7 ⁄ 8-inch, 3-inch shells.
The Savage Model 242 is virtually identical to the Model 24, except that both barrels are chambered for .410 bore 3" Magnum with full chokes. These guns were manufactured between 1977 and 1981. [7] Like all later Model 24s, it uses a single trigger and single exposed hammer with a barrel selector lever incorporated into the hammer. [7]
Table of shotgun chokes for a 12-gauge shotgun using lead shot Constriction (micrometres) Constriction (inches) American name British name Percentage of shot in a 76 cm (30 in) circle at 37 m (40 yd) Total spread at 37 m (cm) Total spread at 40 yds (in) Effective range (m) Effective range (yd) 0.000: Cylinder: 40: 150: 59: 18: 20 127.005: Skeet ...