Is that the Bullet that did JFK in? Looks like it can do all sorts of special things.
A red tip is for Tracer but it looks like that Red was hand panted on, and the last picture is a drawing by hand.
That's what Tracer rounds used to look like, way back, they are a bit different now.
Since the Round in the middle picture has a blunted nose for use with a Rifle Grenade incorperating a Bullet Trap, if it were me, I'd go with that, and just say the drawing was some sort of Rocket Assist concept for extended range.