Editing Hollow-point bullet (section)

== Testing ==
[[File:22 hollow points.jpg|right|thumb|Three fired [[.22 caliber]] hollow-point bullets, recovered after being fired into water. To the left is a bullet of the same type that has not been fired.]]

[[Terminal ballistics]] testing of hollow point bullets are generally performed in [[ballistic gelatin]], or some other medium intended to simulate tissue and cause a hollow point bullet to expand. Test results are generally given in terms of expanded diameter, penetration depth, and weight retention. Expanded diameter is an indication of the size of the wound cavity, penetration depth shows if vital organs could be reached by the bullet, and weight retention indicates how much of the bullet mass fragmented and separated from the main body of the bullet. How these factors are interpreted depends on the intended use of the bullet, and there are no universally agreed-upon ideal metrics.