10.cm penetration into the chest cavity sounds to me like they used piglets "thru the wall & into some organs". Slightly hyped or out of context but still a very valid concern I think.
When I was at school I had some mates that would go out with full face helmets and have war games, shooting each other. Back then the springers were very low power and wouldn't even penetrate both sides of a coke can at a few metres, But I was still too chicken/smart to join in that game.
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