Lands And Grooves Ballistics

M16 Barrel Rifling Pictures

And those portions of the bore which are situated between the grooves are known as lands. Gauge or Calibre- Both types of firearms are classified by the Gauge, or Calibre, of their bores that is by the internal dimension of the barrel A different system of measuring, however, exists for large smooth-bores and rifled arms. Large smooth-bores are measured by the number of Pig. x. Cross-section of a rifled barrel showing the grooves and lands. Pig. x. Cross-section of a rifled barrel showing the...