The bearing stops the shell plate in the correct position but the 1050 has guide rods on it that help line everything up also, without the bearing the snap is gone and it still lines up correctly.
Got DQ'ed at my first major match, A1 two years ago, broke the 180 on a up range start really disappointing but what are ya gonna do, I was to worried about my daughter shooting and paying more attention to what she was doing than myself.