Will,
You are correct about the setup issues. I have taken to removing the bolt from a rifle and setting it up on target on bags with a laser bore sighter installed. I then use the light from the bore sighter on my palm held in the middle of the screen opening to line the screens up. It saves having to go back and forth from the bench to check progress.
I also have a yellow plastic chamber safety flag I set into the open breech of the rifle on the bags that has the words "Remove Bore Sighter First" printed on it. I've seen a couple of photos of what is left of the barrels of those who forgot to remove them before firing.
Nothing wrong with 14' or any other distance as long as the chronograph is triggering properly there. The value of the information is in figuring muzzle velocity. Obviously it matters more for the military 78 foot velocity measurements.
Have a good rest of the weekend yourself,
Nick
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