I think anyone who has ever used a pistol will view this tale with a sad shake of the head. Sad because it would be nice if it were true, shake because it almost certainly isn't.
Most people could not reliably hit a football with a pistol above 15 yards yet we are asked to believe that he hit a similar sized object that was travelling past at 70mph, almost certainly much much further away than 15yards whilst swinging beneath a parachute? That really is stretching credibility too far. The odds of a lucky shot must be many millions to one. Who verified the story? Were there witnesses?
Looks to me like a nice morale-boosting feelgood medal award that the press would have a field day with and make everyone smile, and no harm in that, but as to the accuracy of it...