RE: 7mm rem mag
Just an FYI for Trailer, I have shot many deer with my .30-06 which is enough gun by all means to put a bullet through both sides of an animal. I thought you couldn't stop the lead until last year.
Last year I shot an Axis Buck close range about 40 yards perfect heart/lung shot. Using 180 grain Core Lockt Remingtons. Anyhow just like in your situation the bullet never went all the way through. I found it between the hide on the opposite side.
This year I plan on going back to the 150 grain Federal Premiums.
Jason