from Off The Grid News

[NorthernRaider]

Erm chaps, FYI not all hollow point rounds are actually hollow point in the sense you understand, whilst many hand gun rounds are actually open ended others are actually copper covered so they can remain high velocity but the hollow space under the coating allows for deformation on impact. or they can have an expansion thingy in the nose of the round to deform the round hollow point style.
Military forces are not supposed to use any rounds other than FMJ, AP or Tracer and technically our cops are breaking a geneva convention by using frangible or deforming rounds.