you've not met the kind of players i've seen, our record so far is failing to call a broadside from a 40-mike......
couple of months back running the dragonuv there was a chap in that position, called me over to take a shot (because of course big gun with a scope=more range but that's by the by and tbf i was yeeting .48's), my first shot went about a foot over the guys head, close enough for him to flinch but definately not a hit, meanwhile all i'm hearing is "you hit him you hit him".
likewise yesterday i was being credited with a double kill despite being 99% certain the first guy the bb passed didn't make contact (ironically he was the guy i was aiming at, the second bloke walked out at the wrong time)
unless you not only see the bb land, but you know it's close enough to impact with authority and hasn't bounced off a mag pouch or something where they might legitimately have not felt/heard it, then you gotta give them the benefit of the doubt.