both are good coyote guns. The .204 is a much flatter shooter and a much faster round. it was made to have the ballistics of a 22/250 but burn much less powder and because of that there is alot less barrel wear.

I have both those calibers. the .204 is much more accurate (for me)

on coyotes with 32 or 40 grain v-max bullets, I know that there is a pin sized enterence and hardly an exit most times, with the insides turning into mush. The 223 is alot harder on furs.

as of right now ammo for the .204 is there but not as much as the .223 YET. but in my neck of the woods, anything other than 55 grains for the 223 is not on the shelves.

so far for the .204 i have found 32, 34 and 40 grainers in v-max and hollow points. if you can reload then there is alot more choices. I heard that there are 39 grainers out now. You won't go wrong with either but you will love the .204!