Assertion: projectile's diameter | /r/HasProperty | a few thousandths of an inch
Facets:
value: usually
type: DEGREE
Source sentences:
text: Driving bands and obturators are used to seal these full-bore projectiles in the barrel because of manufacturing tolerances; there always exists some gap between the projectile outer diameter and the barrel inner diameter, usually a few thousandths of an inch; enough of a gap for high pressure gasses to slip by during firing.