this post was submitted on 14 Aug 2024
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There's 470 joules of energy in a 9mm. That's 0.1 kcal, i.e. you need approx. 666 mp5 mag dumps for your daily energy expenditure.
Another way to approximate this: there's about 0.3g of gunpowder in a 9mm cartridge. There's about 3 kJ/g of energy in gunpowder, i.e. one 9mm has about 1 kJ worth of gunpowder. So with the gunpowder alone you'd need almost 10,000 rounds for your daily energy needs.
The bullet energy is from several sources and it's below 500 joules. 2,000 kcal is 8,400,000 joules.