Scenars have a large hollow cavity at the tip, they're designed that way to make the bullet longer to increase the BC.
The hollow tip is just a thin piece of copper with no support so if it snaps off the now exposed lead and copper jacketed body of the bullet can expand and penetrate.
Once the bullet hits the target the tip did it's job getting the bullet there.
However it works, as long as it works it's all good.
