Apparently not in Colorado for elk or deer either. Damn, legit i was planning on taking my T3X/.223 on my 4th season hunt. Glad I decided to double check on that one. 300WSM it is.For a hunter chasing fish or birds in the wilderness, a 16-inch .223 would make an excellent defensive elk rifle during the rut, when bulls can get aggressive. Unfortunately, the mighty .223 isn't allowed for offensive use on elk.