The first guy I knew with a crossbow bragged that he shot his first deer with it at 80 yards. Spined it, and it dropped on the spot.
This was probably 1998 ish....
I hate to think of the deer he almost certainly wounded and lost over the years.
I never hunted with him. Glad I didn't.
Modern crossbows are capable of impressive shooting. I still limit myself to 30 yards personally. Even though that could probably be 40 without much concern.
-Jake