I saw SB "SS109" hit a 3/4 inch steel plate at 200 yards. It took nice deep gouges out of the plate, but nothing noticeable bounced back the 200Y we were shooting at.
I have been hit by my own bullet at a plate shoot at 50 yards using 7.62 X 39 Chinese steel core.
I have also been hit by my own 9mm while leaning out a door taking a shot. (no idea what it hit) [I had a good reason to be doing this at the time.]
I had a .22 CB miss me by inches after shooting at a target on a rail road tie. The shot went lower than I expected, hit the tie, and came back 60 feet and missed my head by no more than a foot.
A month ago, a guy on a neighboring farm had several steel plates set up on his property. There was a 20 foot high hill at the end of the range. He never admitted to what he was shooting, but the bullets were bouncing off the plate which about 100Y from him. We were on the other side of the hill on our property, about 30Y beyond the hill being used as the final backstop.
We had several bullets fly over our heads into the trees behind us, and finnaly, several came right through our camp site. The bullets were hitting a heavy steel plate, going through fairly thick trees overhead, completely flying over the hill, and still going another 50-75 yards beyond.
Long story short - your bullets could go anywhere.