Ok, so I am using FsPassenger and I finally got my pilot enough points and flight hours to purchase a King Air 350. I don't know why, but, I only get around 600nm and it uses 65% of my fuel source (I took off with full fuel tanks). FSX says it is supposed to give me 1,750nm, though I get nowhere close. My throttle is set at 68% for cruising and the prop RPM is at around 1650. I cruise at 30,000ft. I need a second opinion, I have begun to think about going into the CFG file and changing fuel consumption, unless I have something set wrong.
Here are all my throttle control percentages at cruise:
Throttle: 68%
Prop control: 46%
Condition Lever: 100%