Caliber is a measurement of the width of a bullet using the Imperial system. For example a .50 caliber round is 1/2 and inch wide, a .45 ACP round is .45 inches wide. The metric system is used in the same way, a 7.62 round is 7.62mm wide. Keep in mind these measurements are based on the physical bullet and not the casing as well. Rifle and assault rifle rounds typically have wider casings that bullets.
Yes, you can shoot .38 caliber ammunition in a .357 caliber firearm.
That depends on the caliber. Different calibers are different sizes and weights.
Yes, the Medusa is one.
No, unless it's a frame with barrels that can be changed to suit different caliber ammunition.
Yes, you can shoot .38 caliber ammunition in a .357 revolver because the .357 revolver is designed to also shoot .38 caliber ammunition.
A type of ammunition.
air rifle
.30 caliber.
.357
DO NOT DO THIS!!!!!!!!!!!!!!!!!!!!
No
No