I guarantee that you will be able to see something when the distances get out there. The videos posted here are terrible quality, although the tomcat videos were way cool!! Set up behind the shooter, put the target at the bottom 1/4 of the sight picture of the spotting scope, focus at about 70-80% of the distance being shot, and do not look at the target....look above the target. You will be able fallow the bullet to the target, (or the MISS :eek
I can't say for sure that I ever saw a "vapor trail" , but I can see something that shows me where the bullet is!! I get a kick out of people who have never seen it or have never even heard of such "nonsense" as to be able to see the bullet. The response is always..."DO THAT AGAIN!!!"