I have both a .204 Ruger in Ruger No.1 and a Tac 20(.223 case necked down with blown out shoulder) in AR platform and both are accurate and do a decent job on predators with minimal fur damage if that is important.
Had the Tac 20 for several years now and killed a lot of critters and still use it occasionally when saving fur.
The biggest drawback for me in all the 20 calibers is lack of bullet variety. I really only trust one bullet which is the 35gr Berger.
The Vmax/Blitzking plastic tipped are fine for prairie dogs and Rock Chucks but you will have issues with Coyotes if you shoot enough. Here is the AR Tac 20.