Here's my take on it. When somethingbreaks off of a bullet it's a fragment of the bullet. So when anythingbreaks off, the bullet is fragmenting -whether intended in the bullet design or not.

Up until the Lehigh came along, about the only bullets designed to fragment (or in which fragmentation was at all desirable)were centerfire varmintbullets. The goal inthemanufacture of hunting bullets was controlled expansion with the least possible amount of fragmentation, or no expansion at all in the case of dangerous game bone busting solids which seldom fragment. About the only bullet I know of that achieved excellent expansion with almost zero fragmentation is the Barnes.

Now, along comes Lehigh with a new and unique concept in a hunting bullet - built in and controlled fragmentation. I say "controlled" because the key to such a concept is apredictable number and size of fragments. I don't know if they started out with that goal, but that seems to be what they ended up with. Based on the game-taking results Grouse reported it looks like a viable concept. But it's going to be awful hard to give up a lifetime of searching for the perfect mushroom.