Question: what is a 50 cal?
Answer: In practical terms, “caliber”, in guns other than personal firearms, is defined as the total number of projectile diameters from breech to muzzle. So, a 16″ Naval Gun is also a 50 Caliber gun because the projectile is 16″ and the barrel is 800″ (800/16=50). So… a “50 caliber” projectile can be anything (a .