I guess that particular definition means different things to different people. To me it means a bullet that starts disintegrating on contact and gets very little penetration. To me to fragment is what a hand grenade designed to throw shrapnel does.
I also believe that if we as a group could agree on a set of definitions it would prevent some unnecessary misunderstandings.
I believe that it is difficult to determine what damage a bullet is doing or how deep it will penetrate by retained weight. I wish we had a system that we could use to catalog just exactly what a bulletwill do. Lee