The WTC bullets wehre quite streamlined for the day, I think. I remember them looking more like a tapered nose, almost Sierra-like spitzer, with a fairly wide nose - and hollowpointed? Memory is dim on this.
It's amazing how quickly a round nose gets out to 300 yards, and still smacks a whollop when it gets there. Too many people are hung up on stuff that doesn't matter, like foot pounds of energy. It's just a number to sell high velocity.