Sounds to me like if your deer falls within 30 yds, you don't need a pass through. Honestly, IMO, the perfect bullet is one that expends all its energy inside the animal and stops just short of exiting. I've taken many deer over the years with patch and ball and never had an exit. Heck sometimes never even a blood trail. But I found the deer and they were just as dead. Stick with what is working for you and hone your tracking skills for when they are needed.