ABOUT .72 caliber. I say about because the degree of choke on a shotgun changes the muzzle diameter.
the 12 guage is a caliber not a gun
The term 12 gauge is used to describe the caliber(bore diameter)of your shotgun.A 12 gauge barrel is 72 caliber,but the word gauge is used so people can determine you are talking about a shotgun,instead of a rifle.
Yes. The Mossberg 500A1 is a .12 gauge shotgun.
It's difficult to answer the question because gauge and caliber are two different things, and different shotgun shells have different types and numbers of projectiles.
.61 Caliber is the same as 20 gauge. Rifles are generally measured in caliber which is expressed as bore diameter. A .44 magnum means a .44 inch bore; similarly countries with the metric system use metric bore measurements (ie. 9mm Luger) Shotgun measurements are expressed in gauges. Gauge measurements are fractions of a 1 pound ball of lead. A one gauge shotgun shoots a one pound ball of lead. A 12 gauge takes 12 round lead balls to equal a pound and a 10 gauge equals a tenth of a pound. The smaller the gauge; the larger the bore. The only shotgun I am aware of that is measured differently is the .410 shotgun which is approximately .45 caliber or a 67.62 gauge.
Impossible to answer without a detailed description of ALL markings, caliber/gauge, barrel length, sights, stock, etc
Caliber is the measure of th internal diameter of the barrel in inches- a .30 caliber gun fires a bullet that is about 30/100ths of an inch across. European guns are usually measured in millimeters- a 9mm fires a 9mm diameter bullet. Bigger number equals bigger bullet. GAUGE is an older term used to measure the internal diameter of a shotgun barrel. It came from the number of round lead balls that fit the barrel that add up to one pound. So 20 balls in 20 gauge weigh one pond, 12 balls in 12 g weigh one pound, etc. SMALLER the gauge, bigger the barrel. The .410 shotgun is the exception- that is really .410 caliber.
gauge
Shotguns are described by gauge, not caliber. It should be marked on the barrels as to which is the correct ammuntion and gauge. Shotguns are described by gauge, not caliber. It should be marked on the barrels as to which is the correct ammuntion and gauge.
No serial number equals no way to answer
12 gauge equals 0.0808 inches or 2.0525 millimetres, if using the American wire gauge (AWG) scale.
Written as .16 caliber (notice the decimal point?), that would be a VERY tiny bullet- .16 inches in diameter. That is smaller than a metal BB- which is between .17 and .18 inches. Written as 16 caliber (no decimal point) it would refer to the length of a cannon barrel- 16 times longer than it is wide. But you may have caliber confused with gauge- shotgun shell sizes are usually given in gauges. A 16 GAUGE shotgun is about .69 caliber- or .69 inches across the shell. They are smaller than a 12 gauge, bigger than a 20 gauge (with gauge, smaller number means bigger)