i shot my bear this year through one lung it was a tough track job but there was a dead bear at the end of it. i shot him with a wheelie bow it took 10 years for me to draw a tag and i was hunting a 450+ lber down to the las day the last hour and he never showed alittle one did so i took him so i cant say how a good size bear handles a single lung hit. But from working at the taxidermy shop and doing alot of talking and listening they seem like a fairly easy animal to put down, draw a line horizontally thourgh the middle of the body and virtically through the middle of the lenght of the body any hit above the horizontal line and to the front side of the virtical line youll have a dead beer for sure, be aware that it is easy to shoot low on these critters they have big saggy bellys good luck its a fun hunt