ThisFrickinSite wrote:ozone wrote:the fact that it breaks the sound barrier means it will kill you before you even hear it
it takes time for our body to take information from our senses. About 80 milliseconds, but height also plays into that a bit. so really, any bullet that can kill you in less than 80 milliseconds wont even be seen. you will just drop dead and never even feel, hear, or see it because your brain is stopped (assuming you died) before it can take information and process it.
Except that people tend to not die immediately from bullet wounds which do not disrupt brain matter - and even then, people have survived. Hell, there's this article about a kid surviving a three foot harpoon through his brain.
Also, I'm having a REALLY hard time coming up with a rifle cartridge that is not supersonic (apart from subsonic loads) by at least a multiplier of two, having the 7.62x39 flying out the barrel at around 700 m/s, and the 5.56x45 at around 900 m/s. The speed of sound at sea level is ~340m/s - even the 7.62 will be exiting the barrel at double that speed. It will still be going at 400m/s, well over that speed, at three hundred meters away.
Now of course I'm pulling these stats out of my ass and memory, but I could dig up stuff from ammunition manufacturers if necessary to confirm the numbers. Speeds are from standard length barrels for the military variants.