For Benchrest shooting at 1,000 yards I use Federal 205M probers Esther than 205s as pointed out he match grades are inspected during the manufacturing process more closely. On top of that I weigh sort mine after sorting them by height. At a thousand yards a slight variation in ignition can give you vertical while trying to hold groups under 3 inches.
For pistol shooting even from a Ransom Rest , at pistol distances, I doubt you would find any difference at all.

Can be a Huge difference with shotgun primers and their lower pressure points .

Bob

__________________
Sag Harbor & Manhattan, N.Y.