Lots of unique because a little goes a long way. You can make just about anything go bang with it and in a SHTF situation your probably going to be more worried about noise levels and making what you have last than long range accuracy and ultra flat trajectories. Oh yeah, and add a 45/70 and bullet molds to your list. It is quite possibly the most versatile cartridge out there and will preform well with a huge range of powders from black to the latest greatest. Lead is available everywhere so all you would have to carry is powder, primers, a mould, a ladle and a Lee Loader.