Animal hides are like bullet traps especially if the bullet is in that classic mushroom shape, I would not read anything into it unless you saw little damage to the internals indicating the bullet was easing though instead of creating a good permanent wound channel.
"Pain is weakness leaving your body"
Yes, bullet was mushroomed perfectly and internal damage was perfect to say the least... I have no concerns with the bullet itself. Just suprised to see it didn't exit. At first I almost convinced myself something was wrong with the load. But yes, great performance. Like I said, deer was dead before it hit the ground.