\ I used a "slow" and in a heavy 200 grain bullet on deer, when I was younger and still do on occasion.
For quite some time my bullets would pass through and all the deer with an all pass through was immediately knocked down and the deer killed . I was so effective that I never fired for the lungs and fired at the high shoulder area.
Then checking one deer, I found a lump on the far side of the shot. It was a bullet. I cut the hide and found the bullet had expanded to twice its width. It went from .35 inch bullet to a .70 inch bullet.

It was effective enough for me. Never did go to a lung shot. Never did worry about what other's did. And never worried about being different.