I've enjoyed this conversation and will use the FPF velocity reference in the future.
Was raised on a diet of Keith, O'Conner et al, seems like a million years ago and have been aware of the story for a long time. Never had cause to question it for any reason. In fact my own experience supports its veracity. When a person become intimately familiar with a particular firearm it is quite unwise to bet against them. I've pulled off a number of stunt shots in my day and have witnessed others do the same. I've won and lost bets over the years in both directions.