Shock wave
I have had a horrible time with these bullets. First i shot a doe right behind the shoulder and half of the bullet broke off and went into the guts. Second i shot a doe right in the shoulder and it riped a chunk of flesh off but it never penitrated and the deer was seen walking arouond fine about two days later so i threw them in the box. But i am possitive it is'nt due to the powder because i haven't had any problems before and we went up to our closest dealer and they have gotten tons of complants about this same bullet wich is made by hornady.