WAC 220-414-020
(b) Turkey, which it is unlawful to hunt with a weapon other than the following:
(i) Crossbow or bow and arrow;
(ii) Shotgun shooting #4 or smaller shot, or muzzleloading shotgun shooting #4 or smaller shot;
(iii) Legal modern handgun designed for hunting, shooting #4 or smaller shot, and not capable of holding more than three shells. Handgun barrel length must be a minimum of 10 inches, inclusive of choke tube. Modern handguns must shoot a minimum three inch shotshell of .410 caliber or larger;
(iv) Legal muzzleloading handgun designed for hunting and shooting #4 or smaller shot. Handgun barrel length must be a minimum of 10 inches. Muzzleloading handguns must be .45 caliber or larger.