Answer (1 of 4): 12 gauge is a shotgun bore size . Bore refers to the number of round lead balls which exactly fit the bore which can be made from a pound of pure lead. 12 gauge ( nominal 0.73 caliber) means 12 balls to the pound, 16 gauge ( nominal 0.66 caliber) is 16 balls to the pound , 20g (
What is the easiest shotgun to shoot? - Quora
What is 12-gauge? - Quora
What is your favorite shotgun shell, buckshot, slugs, or birdshot
How thick is 12 gauge steel in inches? - Quora
What is the wall thickness of a shotgun shell? - Quora
Are shotguns really as powerful as video games make them seem? - Quora
What is the most powerful 12 gauge? - Quora
A Shotgun's Gauge, 60% OFF
Which is the best 12 gauge shotgun? - Quora