if you play your cards right, you can take out a full set of b-17's from 1k out with 2 rockets from a 110. put the bombers at the bottom of the pipper and wait for range to change from 1.2 to 1k, as soon as it turns to 1k, fire!! the only one that can get you from 1k out will be 999000 and a couple of other guys, but for the most part you're pretty safe.