He had us run on a treadmill for 3 minutes, run to the door of a shooting house and pick up an at then try to hit a dummy with 5 shots. It was amazing how many good shots missed. He said that simulates panic situations. We did the same drill with a 12gs loaded with OO buck. Errbody destroyed the dummy.
That helped me decide what the best home defense weapon was. Lol
There are certain situations where some people can make arguments for pistols but all else being equal basically everybody shoots better with a long gun. (be that shotgun or rifle)