When we transitioned to the Glock we ran a little race. 5 shots into the B27 at probably 5 yards. I was able to do it in 1.53 seconds from the holster to the last shot and from concealment. I should say we were permitted to have our hands on the butt of the weapon. So, that equals 214 rounds per minute unless we make allowances for the draw and sight acquisition and remove it, which we should for this equation. I will venture an educated guess that the time not pulling the trigger was about 3/4 of a second, I don't really know and am just guessing here. This gives 384.6 rounds per minute. A full auto Glock will do multiples of that. I am quite sure a pro shooter can do far better than I can. I will guess that 450 rpm+ is attainable while keeping lead on a largish target.