Colorado requires hunters to use open sights, loose powder, and either conical bullets of the caliber size or round balls (no sabots). There are similar restrictions in California, Idaho, Nevada, Washington, Oregon, and in certain areas of New Mexico and Montana. Several of these states restrict equipment even further. Some don’t allow jacketed bullets, and a few even outlaw inline guns with sealed breaches and 209 primer ignition. The idea, since many western states offer muzzleloader hunting during the choicest parts of season, is to maintain the quality of the hunt by keeping the primitive challenge in place.