What does chamber mean on a shotgun?

What does chamber mean on a shotgun?

The Chamber refers to the part of your shotgun where the cartridge will sit, and the chamber size refers to the length of the Shotgun Cartridge it can accommodate (when fired). Most old English shotguns have a 2.5” chamber, European-made cartridges are measured in mm so the equivalent is 65mm.

What is a 12-gauge chambered in?

Shotguns come in a wide variety of calibers and gauges ranging from 5.5 mm (. 22 inch) to up to 5 cm (2.0 in), though the 12-gauge (18.53 mm or 0.729 in) and 20-gauge (15.63 mm or 0.615 in) bores are by far the most common.

What is the chamber diameter of a 12-gauge shotgun?

18.5 mm
A 12-gauge shotgun, nominally 18.5 mm (0.73 in), can range from a tight 18 mm (0.71 in) to an extreme overbore of 20 mm (0.79 in).

What is shotgun bore?

Bore, in weaponry, the interior of the barrel of a gun or firearm. In guns that have rifled barrels, e.g., rifles, pistols, machine guns, and artillery or naval guns, the diameter of the bore is termed the calibre.

What does 12 70 mean on a shotgun?

As the barrel is of smaller diameter then the chamber, the shell partially clogs up the barrel and this results in high pressure. Chamber length is written to the barrel, either in US or Eoropean style. This can mean there is just a ’70’ written somewhere.

What’s the largest gauge shotgun?


  • Shotgun gauges explained.
  • 10 gauge – A heavy firearm with a forceful recoil, the 10 gauge is the largest legal shotgun in the United States.
  • 12 Gauge – Roughly 50% of shotgun sales in the United States are 12 gauge.

Is there a 3 inch chamber for a 12 gauge shotgun?

Three inch chambers remain a reasonable compromise in 12 and 20, and are not available in 16 or 28 gauge. Yet another reason, I believe, that both gauges generally pattern better than they are “supposed” to.

How big is the Chamber on a London gauge shotgun?

Again I’ll cite Browning Arms. The Citori O/U Superlight Feather, clearly a dedicated upland field gun, comes with 2-3/4″ chambers; so do most “London best” side by side field guns made today. In years past, many 12 gauge London guns were built with 2 inch or 2-1/2 inch chambers.

What does serial number on 12 gauge shotgun mean?

If the serial number on your receiver has the letter “A” at the end of it, then this signifies that it is a 12-gauge super magnum receiver. These super magnums can shoot shells that go up to 3 ½ inches in length, as long as the barrel is chambered for it.

Is it safe to use 12 gauge 2 3 / 4 shotgun shells in a 12 gauge?

In the case of the 12 ga. it is similar to using .22 Shorts in the .22 L.R. chamber. A 2 3/4 inch cartridge in a 3 inch chamber is perfectly safe. The other way around definitely is not. Same goes for 2 1/2 in 2 3/4. Equally important is verifying what pressures your gun can safely handle.