I do this too - and I also practice the second and third shot to get quicker at making an accurate followup shot, or move to a different target alongside the first. Starting slow making sure the second shot is accurate, then practicing and speeding up, but only as fast as can be done accurately (hunting shot accurate - not trying for the 1" groups). For this exercize I use a 6" target at 100 yards.

Paid off last year as I got my first double! And I felt comfortable and it was automatic and not rushed or panicky.

Practice those wierd shots, don't sit at the shooting bench.