Quilly, yes many people hunt deer with a .223Remington. I myself have used it on CA mule deer. I've taken 3 or 4 deer with that bullet. All under 200 yard shots. Mostly though, that is my varmint and/or javelina gun.

Makes a great "cat" gun (mt. lions/bobcats) (...and yes, mt. lion hunting is illegal in CA. I don't hunt them in CA in case someone is wondering. Idaho!!!!! What a great state to hunt.)