I sent Buds the same question back in February of last year and voiced that Savage site listed it as .223 not .223/5.56 and thought they might want to check on that to keep maybe someone from getting hurt or damaging the rifle, and this is part of the response I FINALLY got back from them:

In reference to 223/556, there are as many opinions as shooters. I would follow the manufacturers recommendation for that specific product.
That's why I have not bought anything from them since!