The diameter
The bore of a gun relates to the diameter of the hole in the barrel - and in turn the diameter of the bullet the gun can fire.
The bore is the inside diameter of the barrel. Simply put, it's the hole down the middle of the barrel.
Yes, a bullet must be the same diameter as the barrel (unless it is a shotgun).
By measuring the inner diameter of the barrel across the lands.
Caliber "Caliber" is a word for the diameter of the bullet or the bore of the gun.
Depends on the caliber, type of barrel, whether it is on a handgun or rifle, etc..
Grooves
Yes, it is called "spiking", although it is likely to cause the barrel to explode if the gun (or artillery piece) is fired. YOU CANNOT PREVENT A GUN GOING OFF, BY INSERTING YOUR FINGER INTO THE BARREL
With rifles and pistols, it is the diameter of the inside of the barrel in inches. So a .45 caliber pistol has a barrel 0.45 inches in diameter. In can also be expressed in metric terms- caliber 9mm means a barrel that is 9mm in diameter. With cannon, such as those on a Naval vessel, it is the relation of the barrel length to the internal barrel diameter- so a 3 inch 50 caliber cannon fires a shell 3 inches wide, from a barrel 150 inches long (3x50).
Looking for someone with history of a single barrel shot gun with wells Fargo & co on barrel and four notches also on gun like to know if its from the stage coach era as the shot gun is called coach
the barrel is the long part that the bulliet comes out
Threaded