Personally, I've seen liver hit whitetails that have gone a long waysand lived a long time.

One that comes to mindthat I hit went about 300 yards before bedding, he ran though from the point of impact. We waited 5 1/2 hours and he was still alive in a bed, but couldn't get up.

Another one a friend hit. He did not run, but walked away. He went about 150 yards. We waited seven hours before looking for him, and again he was alive in a bed, but could not get up.

I'd always suggest waiting six hours if you can identify the hit on a liver.