I think my favourites are the 85gr Interbonds and 90gr ballistic tip which gets more velocity than you would expect compared to the 95gr.

I've killed with 105gr speer spitzer (ok not great), 100gr partitions (great), 100gr hornady RN (ok), 95gr ballistic tip (great), 87gr hornady sp (good) 87gr Hornaday bthp (great for small deer/neck shots) 85gr speer btsp (great for small deer but not as tough in my experience as reported above).

My experience has been that a 243 needs expansion to work well and that if you place such a bullet well its a great cartridge. Apply weight and toughness and shot reaction can be poor (105gr speer and 100gr PPU factory). An accurate 243 with a good bullet and a good shot is hard to beat.