I think I explained my definition in a prior post I made about load testing ie Bullet failure. Early in my reloading career I was experiencing Bullet failure when I use to rifle hunt. Yes I got burnt with the sexy looks of the Ballistic tips shooting the wrong load recipes which resulted with a couple of wounded animals that i am not proud of. The bullets fail to expand properly. This why I don't shoot per say cookbook loads before I do I use you guys as a reference and then I decide if it's worth my while to invest time in. You have to put the proper amount of range time in