I would contend that most (if not all) “long shelf life” dehydrated/freeze dried food products fail to deliver the calorie and protein count that is required to survive. It is far more likely that you would have to double the quantity and cost to actually achieve any specified duration. If you don’t believe me, just examine the details in their advertising.
As for food, she said that she thinks she would be able to get local produce if shipping were disrupted, but admitted that she had became concerned at the end of last year, when Brexit negotiations were stalling. So she started buying extra cans and more dried food and fruit — items with a long shelf life — when she went shopping every two weeks. Then she added pet food (both her cat and her dog require special diets), and bought seeds to grow fruit and vegetables in the garden.

The reason the vacuum sealing system’s up on this list is because I feel food has a much longer “shelf life” so to speak when its vacuum sealed before being thrown in the freezer. Used to have a lot of power outages when we lived in Toronto, and each time our food would thaw out a little it’d taste worse and worse – except for the one vacuum sealed slab of meat we got from a neighbour which I think withstood 2-3 power outages (one which lasted 4-5 days) and tasted as though it was vacuum packed the day before. I’ve also heard of people vacuum packing rice into smaller one-serving portions, and have always thought that a great idea for cases you might want to throw a bunch into a pack and go, or just generally extend the shelf life of your food/prevent rats and mice from getting into things. Necessary? No. Definitely still something I want, though.
Personal defense items – such as rifles and heavy firearms – are going to be increasinly hard to manage the farther you move from steady supplies.  Ironically, it’s firearms that help acquire more food, provide personal protection, and deter others from attacking.  In a SHTF scenario, heavy armament is only good within fortified areas.  If you want to stay highly mobile, switch down to a .22LR polymer rifle such as the Savage survival rifle or similar.  Lightweight, collapsible, and perfect for hunting game.  Loaded with subsonic rounds, it can also be a lot more efficient than heading off a target with a loud 30-06.
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