Most of the area I hunt in we have to use lead free bullets to hunt with. We don't want to, we have to.
Between my son and I this year we killed three bucks with 150 gr Nosler E-Tips. Two of them were killed with factory Winchester 30-06, 150 gr CT E-Tips and the other one was killed with factory Winchester 300 WSM 150 gr CT E-Tips.
All three bucks were shot at less than 100 yards and all three had the bullet go right through them. None of the deer went over 30 yards after being shot. The exit holes on all three bucks were very small. The second buck my son killed with his 30-06 had the smallest exit hole I have ever seen on a deer. It looked like it was the same size as the entrance hole. The exit hole was very hard to find.
Unless you are hunting dangerous game or you have to by law I wouldn't use lead free bullets.
None of the six calibers we have been shooting lead free bullets in shoot as accurate as they did with lead bullets.