If I am watching TV in my family room and 5 armed youngens come crashing through my side door I am in real bad shape. My shotgun and handgun are in the bedroom, as I ASSUME that my house will be broken into at night.
The key is to fortify your entry ways to prevent such an instant entry. Make the five youngens work to get in, buying you precious time to get to upgraded armament. Don't assume anything. That the extra few seconds to put the shotgun next to you if you will be there for an extended period.