I have loaded a wide variety of combinations, 55 gr ballistic up to 100 gr, with diferrent powders and charges. Its been fun experimenting since the 243 is a sweetheart to shoot. I have had good accuracy results out to 300 yards but I have not taken a deer further than 40 yards with it. Still wanting to play at further distance and take a buck beyond 200 with it.
Bottom line, experiment with loads and see what your rifle likes. Good luck and have fun!