A professional who tends machine to ream muzzle end of shotgun barrels to choke bores that control spread of pellets during firing. Respnsibilities include:

• Reams to specified distances within barrel bore with rough, finish, and margin (choke) reamers.
• Visually examines and measures inside of barrel after reaming to ensure that barrel has been reamed to specified length and diameter, using plug and dial gauges.