This is so true. I kill Elk with a .50 caliber muzzleloader, and finding no blood is common. When I make what I know is a good shot and there is no blood, it can be challenging to find the animal, mainly if they are with a group. The problem is that the 385gr pure lead bullet does not exit. I shot a cow last year and felt good about the shot, but there was not a drop of blood, nothing. I was able to follow her tracks and found her. The bullet had damaged the liver enough that she bled out internally but managed to go quite aways before tipping over. You may not believe this and I didn't either, but I shot a Coyote up its' bubblegum, and not only was there no blood, but the bullet didn't exit and this was with a 7mm rem mag!