A cool web page with all different types of round types with cross sections.
Enjoy
http://www.ar15.com/ammo/project/Ammo_Cross_Sections/index.htm#M889 5.56mm Incendiary
Enjoy
http://www.ar15.com/ammo/project/Ammo_Cross_Sections/index.htm#M889 5.56mm Incendiary