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.45ACP bullet has a lot more energy than a .223
...that seems like a data-error:
a good .45 is about (all metric) 14grams at 230meters/sec = 500 Joule
a good .223 is about (all metric) 3,56grans at 988meter/sec=1740 Joule
The .223 has about three times the energy of the .45. You seem to overloock that kinetic energy is mass x speed x speed (=speed square) / 2
Therefore the bullet speed counts way more than its weight....
so no .45 has a chance of coming even close to the energy of a .223. The .45 would be en extremely hot load if it reached a third of the energy of a .223.
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Si vis pacem - para bellum
If you want peace - prepare for war
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