AFIR my pre-planned mission was to take pictures of what was left of 3 towns in western Poland. After that who knows? As to range, at 300kt low-level fuel consumption was assumed to be 6000lb/hr for the first hour, 5500lb/hr for the next, and 5000lb/hr for the 3rd. If you increased to 450kt it was considerably more - but you could steam past any F104 you spotted ahead of you (its smoke was a dead giveaway).