I hit a bull elk in that same spot one morning a few years ago. Complete pass through. Never could find any blood. 3 of us looked for him for around 8 hours to no avail. Right at dark that same night, he came out on the opposite side of the canyon pushing his cows and rutting like crazy, blood stains down both sides of his body. Saw him several more times over the next week and he never seemed bothered in the least about it.