My son made a serious attempt for the ONE HOUR PULL UP record, about ten years ago.
He completed 312, the world record was 320.
At 6-2 his arms are too long! Longer travel and cycle time.
IIRC, now the record is over one thousand.
No kipping, they video the event.
Excellent.
On a good day, I can do 3 sets of 20. But I’m OK with that- I just turned 50.