Wouldn't things like canned wild salmon, canned tomatoes, be safer than the food you seal yourself? I wouldn't trust that stuff wouldn't leak in or grow, but I'm one of those people who washes their hands like six times while preparing raw meat.
If I was in a year-long emergency, whether I was eating Paleolithically would be my smallest concern. Stocking for it would not only be difficult in the finding of products, but in the expense of buying that amount of those types of food all at once. Depending upon just what type of emergency you're talking about and where you live, I'd consider including some plant seeds, so you could start a nice emergency-garden.
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