Thanks for the good article, John.
Occasionally when I am at the range shooting through my chronograph I am approached by another shooter curious about the chronograph. It is frequently obvious that they are curious about the factory ammo that they are shooting. I usually offer to let them take a couple of shots through the chronograph, but I warn them that the result will almost certainly be lower than they expect.
The 243 Winchester rifles have been the most deficient in velocity of the various factory loads that have been tested over the years, for some reason (frequently 200 to 250 fps slower than factory claim). The owners of the rifles at first believe they have purchased a bad box of factory ammo, until I run through some of the points covered in the article. I even tell them ahead of time, "don't shoot it through the chronograph if you aren't prepared to be disappointed".
