Answer: calibre

AnswerCrossword Clue
CALIBREDegree of excellence, British style
CALIBRE9mm, for the Sten gun
CALIBREDiameter of a bullet.
CALIBREMeasure of an English firearm
CALIBRETube diameter
calibredegree of ability
calibrethe diameter of a gun barrel, also CALIBER
calibrethe diameter of a circular section
calibrethe diameter of a gun bore