You might be able to keep the speed up, but it will surely be at a significant sacrifice in accuracy, for all but the very top echelon shooters.
Yeah, Paul Harrell made the case that any reasonably competent shooter should be able to shoot 9mm and .40 S&W about equally fast and accurate from the same sized guns, but he fails to take account of the fact that he's an exceptional shooter, even compared to most agents/cops.
