Why do bullets make bigger exit wounds then entrance wounds?


The entrance wound is normally smaller and quite symmetrical in comparison to the exit wound, which can sometimes be ragged

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Exit Wounds

Exit Wounds is a 2001 action film based on the book of the same name by John Westermann. The book takes place on Long Island, while the film is set in Detroit. The film was directed by Andrzej Bartkowiak, and stars Steven Seagal as an urban detective notorious for pushing the limits of the law in his quest for justice. Although the story is set in Detroit, many goofs in production make it apparent that most of the movie was filmed in Toronto, Ontario; Hamilton, Ontario and Calgary, Alberta.

It is the second of three subsequent films directed by Andrzej Bartkowiak and produced by Joel Silver (preceded by Romeo Must Die the year before and followed by Cradle 2 the Grave two years later) that focus on martial-arts based action in an urban setting with a hip-hop heavy soundtrack and featuring many of the same cast (such as DMX and Anthony Anderson)

Penetrating trauma

Penetrating trauma is an injury that occurs when an object pierces the skin and enters a tissue of the body, creating an open wound. In blunt, or non-penetrating trauma, there may be an impact, but the skin is not necessarily broken. The penetrating object may remain in the tissues, come back out the way it entered, or pass through the tissues and exit from another area. An injury in which an object enters the body or a structure and passes all the way through is called a perforating injury, while penetrating trauma implies that the object does not pass through. Perforating trauma is associated with an entrance wound and an often larger exit wound.

Penetrating trauma can be caused by a foreign object or by fragments of a broken bone. Usually occurring in violent crime or armed combat, penetrating injuries are commonly caused by gunshots and stabbings.

Single bullet theory

The single-bullet theory (or Magic Bullet Theory, as it is commonly called by its critics) was introduced by the Warren Commission in its investigation of the assassination of President John F. Kennedy to explain what happened to the bullet which struck Kennedy in the back and exited through his throat. Given the lack of damage to the presidential limousine consistent with it having been struck by a high-velocity bullet and the fact that Texas Governor John Connally was wounded and was seated directly in front of the president, the Commission concluded they were likely struck by the same bullet.

The theory, generally credited to Warren Commission staffer Arlen Specter (later a United States Senator from Pennsylvania), posits that a single bullet, known as "Warren Commission Exhibit 399" (also known as "CE 399"), caused all the wounds to the governor and the non-fatal wounds to the president (seven entry/exit wounds in total).

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