The guy hunting behind us said he killed a buck last year with a rifle that had a piece of arrow and broadhead lodged in a lung ! He guessed it had been shot as a 2.5 year old and he killed it as a 4.5 year old ! I didn't see it........but see no reason why he would lie !!
My cousin also shot a buck that had a broadhead imbedded in one rib on the inside. Luckily he seen the scar from the entry wound before field dressing so he was very carefull because he didn't see any exit wound. The top of one lung was clearly shot thru and deformed looking. It looked as though it healed just fine though because the scar tissue was hard and there was no sign of rotting anywhere. By the looks of the wound on the outside and inside we had guessed it had been shot at the very least , the year before.