Ya know I just got a bunch of Winchester brass .223 not too long ago. Found that they weighed about the same as LC. Your right! Darn urban legends! BUT for some reason what same exact loads would show signs of pressure in the Winchester wouldn't in the LC. Thats weird? HOWEVER, other mil based brass (I think its considered mil brass) like WCC brass weighed quite a bit more. Thanks!
Its good ur asking questions. We all learn from them. yeah!