The 95 grain Partition is my preferred medium game bullet in my .243" bore rifles, but the 80 grain Federal factory loads have worked fine for me when I shot the deer through the ribs and into the pleural cavity. Lots of people shoot their deer with 223 and 22-250 factory loaded ammo that features bullets of equally "marginal" construction.
Federal's 95 grain Fusion load is also a good choice if you shoot factory loaded ammo.
The Marlin XS7 in 243 that I leave at my MIL's ranch is an easy MOA shooter with the 80 grain Federals, but it is used for shooting varmint, not deer.
