[mountainlion]

I saw a demonstration of a new technology bullet that was a compost material, I can't remember the name of the technology or I would look it up for you. It could penetrate a 1/2” steel or when they shot a pot roast it almost exploded the meat. The compost was Teflon, Nylon and unnamed heavy metals. One of the winners of the 50 BMG 1000 yard matches did win with solid steel bullets and my flak jacket in Viet Nam was fiberglass.

[Turbopilot]

The penetration comes from the density of the projectile. This is true regardless of whether the object being penetrated is steel plate or fiber-based body armor. A bullet made of those heavy metals without Teflon would penetrate as well or even better, but would wear out barrels too fast.

If I was too harsh in my original post I apologize. The “Teflon cop-killer bullet” myth, like the “plastic gun that’s invisible to X-ray machines”, was a myth that the media invented to lie about guns and I hate seeing it spread.