• A friend of mine shot a mule deer broadside with a .358 Winchester, and the 250-grain bullet slipped between the animal's ribs. The muley, which had his head down feeding when the shot hit him, raised his head, looked at us, and went back to his meal. My friend nearly fainted. It took a second shot to convince the deer we were serious.
• The same person shot an elk head-on with a .270. After penetrating only a few inches, the 150-grain bullet blew up, and we had to chase the poor creature half a mile through waist-deep snow before he died. If the bullet had penetrated properly, it would have broken the animal's spine and dropped him then and there.
• I shot a zebra in the chest with a 270-grain bullet from a .375 H&H that should have stopped her dead to rights. It blew up before getting to the heart, and I had to pursue the beast for over a mile and shoot her four times more before the animal expired.
That is why you need to know all you can about premium bullets. Many examples are quite expensive, and in some cases using them is a waste of money. Some of them are designed to do very specific things and if not used for those purposes will disappoint you. But if you apply them as they are intended, you can go for several hunting lifetimes and not have to do much trailing.