This is a timely thread. My Dad is rockin' a Remington 7600 in 30-06, and has (to my great surprise) amassed an impressive collection of ten-round magazines for same. He scored them and a whole bunch of 150 gr Core-Lokt when he was working gun shows. He keeps the rifle close at hand, and he has staged mags around the house. Today I helped him put together a response belt- three magazines, tourniquet, light. He ain't John Wick, but neither will he go gently into that good night if the balloon goes up.
If I understand the intent of this thread, Dad has nailed it- a rifle he's dead-asleep familiar with, in a proven fighting caliber. There are social shotguns sprinkled about the house as well. I make sure I bump the horn a couple times before I knock on the front door these days.