Hi Eddie
Ive looke into that before and its not classed as expanding...I believe its termed a dimple point? as only a tiny dimple and not a hollow. I contacted Sierra direct as I was told it could be used on live quarry but doubted this, this came back with the answer of no as they could not say how it would perform on quarry. If you are looking for a good expanding bullet head Sierra make Pro Hunters which in the case of my 6.5 are just as accurate as the Match kings....hence I used all my match kings to Zero and practice on targets, then fine tuned with the Pro hunters for use on game.
Pete