A professional who tends battery of machines that cut spiral grooves into bores of artillery and small arms weapons by either of following methods. Respnsibilities include:

• (1) Inserts barrel in collet of machine and button in hole of push rod attachment on machine.
• Starts machine to rotate barrel and feed it over button to impress grooves in bore.

• (2) Locks broach or hook cutter in drawing head and barrel in indexing head of broaching machine, using wrenches.
• Moves levers to regulate automatic feed and to cut rifling to specified depth and twist.
• Cleans bore, using cleaning rod and patch, and examines bore for burrs and scratches.
• Measures rifling for conformance to specifications, using dial and depth gauges.
• May be designated according to type of rifling tool used as broach barrel rifler; button barrel rifler; hook barrel rifler.