McCullough didn't get suspended for striking (instead we all learned that there is a new offence called 'fighting' that is only a fine, and is not handed out to anyone else from any other team who was involved in fighting earlier in the season - all were charged with striking). The rule book might actually say that is a special charge only available to Broncos' players so they can stay on the field.
I think we can therefore be confident that Milford will get the lowest possible grade contrary conduct charge, and only a fine.
McGuire also pulled CHN's hair separately. He will probably get the same.