He said the scariest sound in the dark is an action of a shotgun being cycled. For a burglar i would imagine that would not be a welcome sound to hear.
I don't know how many times I hear that. It's not
a smart thing to do, period. First, it tells the enemy exactly what you are using to defend yourself, second, it gives away your position. Let the first thing that draws attention to you be your first shot, then move and seek cover. The idea of pumping your shotgun is exactly like firing a warning shot to let someone know you are serious - it's just dumb. Granted, it MIGHT make someone reconsider and leave your house, but it's not guaranteed. They have made the decision to invade your residence, you have the right and responsibility to eliminate any threat.
And don't use small buckshot, it'll just piss someone off, use 00 buck and create some large holes.