You apparently never grew up (and probably shouldn't have) driving down the road throwing beer bottles out the driver's side window over the car roof and hitting speed signs.That could be cool, but at what point do you sacrifice accuracy? Imagine driving down the highway at 60 MPH and trying to hit a road side with a paint gun, even one that fires multiple pellets. While driving. In addition, as tough as dragons are, they do have long necks. If they're even slightly off on grabbing that snack and accidentally hit the ground with their lower jaw, they're going to have a really bad day.
All depends on the fiction of course. An eagle snatching a fish is probably going around 20-30 MPH, but in part that's because unlike dragons they have to rely solely on the lift provided by their wings; they have to maintain that speed to stay aloft. Even then, they can only lift about 10 pounds.
Much to current me's shame.