Trying to show the rifle at anything like its true potential would be very difficult to do working to any kind of time or budget constraint.
A decent group at 2, 3 or 400yds would require use of a proper range, or at least travelling to somewhere it could be done. Is the shooter up to that kind of shooting? Is the rifle still capable of that kind of accuracy? How many takes would you have to go through to get a target that would show the rifle in a good light? It's no use singing its praises and then showing a 10" group on a 200 yard target.
I think they played it safe, and still managed to pass on enough information about the rifle to stimulate some interest, and at least show it being fired. A proper test may well have taken up the whole show.