The bullet which is open at the nose and is covered with lead jacket called

Dum-dum bullet is one which is open at the nose and is covered with lead jacket. When it strikes on the target the lead will expand and produce a larger entrance wound. Hollow point bullet is one which has a pit on the nose. Rubber bullet are used to control the riot and this may cause fatal injury when fired from a close range. Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 140