I don't like premium bullets for deer. I don't want my bullet to retain all it's weight and punch through the deer only to shed it's energy into a tree. I want my bullet to shed it's weight and energy inside the deer.
I'm with you on this. Why use a 300 mag to shoot deer in the first place?
I'd load up some 180 or 200gr bullets for that .300, then buy a .257 Bob or a .243 or a .260 or a .270 or a 7mm-08 for the deer.