What goes up, must come down. And sometimes, what goes horizontally at 1200 fps can come back at you in smaller pieces.
Thefirearmguy experienced this first-hand when shooting some steel targets.
I belong to a 50′ indoor range and when we walk down to change targets, we always see fragments of jackets and other various pieces of bullets.
The bottom line; things can come back at you with enough force to do damage. Be careful, and be prepared!