Today I invited Dave from the *Blog of Gunz and Shenaniganz* to help me explain some of the basics of bullet sizes which are commonly grouped in Calibers, Millimeters and Gauges.

• The three major types of ammo. (Pistol, Rifle, Shotgun)
• Even with the same "caliber" you have different ammo variations.
• Some of the rifle "twin" sizes.
• The larger the shotgun ammo "gauge" the smaller the barrel and ammo.
• And more.