that's where the lead fragments come from. it's an expanding soft point bullet. the jacket peels back as soon as it enters tissue or a skull. >> the snowflaking pattern seen in the president's brain and the x rays of the skull raises a serious question, because military ammunition should not beginni begin to ddisintegrate in that fashion. >> whether it's softed nosed or hard bone, the bullets will strike the skull and be left behind. >> military bullets are unique in several respects. it's got to be a bullet that stays instability. >> now let's shooth the same bullet weight, 160 grain bullet.