Hogs don't seem to bleed much. I shot one this spring, and had a complete pass though. He made it 35 yards away. We only found a few drops of blood, but did recover him. The shot was perfect, it just didn't bleed much. I was using Grim Reaper expandables. The head worked perfectly, but the hog had other ideas. Without recovering the hog, their is no way to be certain of your shot placement.