OAR 635-065-0703. Shotguns — Requirements

Hunters shall use: (1) Any shotgun, including those with rifled barrels, with number 1 or larger buckshot or slugs to hunt pronghorn antelope, black bear, cougar, or deer. (2) Any shotgun, including those with rifled barrels, using slugs (single projectile) to hunt elk. (3) Any shotgun to hunt western gray squirrels.