A friend of mine was bowhunting last year in steep canyon country in Idaho.
He slipped and fell and landed on his bow, he looked it over and everything looked OK the bow did not appear to be damaged, he shot his blunt arrow a couple times and it appeared to be working ok. Got back to camp late at night so didn' t check his sight in. He didn' t have a back up bow to switch to.
Got up in the dark and didn' t get a chance again to check his sight in, he thought from shooting his blunts that it looked like it had not shifted.
Well two hours later he had an opportunity at a 350 bull at 25 yards, he had to shoot through a small opening in the timber, well he hit 5 inches high and his arrow stuck in a limb, byby big bull.
Detected he went back to camp got out his target and checked his sight in, you guessed it, he was shooting about 8 inches high at 25 yards. He had never shot his blunts at a target so didn' t know the difference in impact between the blunts and the hunting arrows.
I' m pretty sure if he could go back now he would have spent the money and had a backup bow all ready to go in camp just in case.