Use a ballistics calculator (
Click here for JBM's online one), and figure out where your bullet of choice drops below ~2000 fps, or ~1500 ftlbs of energy, at the elevations/temps/pressures you're likely to be hunting in.
For example, 160 Accubond, MV = 2650 fps, 6500 ft elevation, 50° F, 50% humidity, 29.9 inHg (corrected), will hit that threshold at ~450 yds. 2070 fps, 1521 ftlbs. Running the same conditions with 160 partition gives about 400 yds.
Then figure out what distance you can hit a paper plate, in field conditions, 9 outa 10 times. Whichever distance is the shorter of the two, should be your maximum hunting range.