i would use the shotgun and use 4 shot. i jus bought a 223 savage for yote hunting 2 weeks ago. and about the calls. i had asked that this yr also and from what people told me is that there prob isnt a pred call out there that wont call a yote in. um if u hunt in colder weather like below frezin like me get open reeded. closed reeds tend to freeze up. people also say that when u go out get ready to shoot as sonn as u sit down. before u start callin cuz they can pop out at any time. most people us a jack rabbit or contail distress call. hope that helps. and heres a great website that has forums on it.
www.predatormasters.com its a good site. i got alot of info off there.