old roper, I've never shot an F-class match. Never had a desire to because, like benchrest shooting, it requires little marksmanship skills to hold the rifle very still while getting a shot off aimed dead center on the target. It's mostly a rifle, reloading and wind doping game, very little's a marksmanship game.
Lots of people have tested their match rifles in various artifically supported prone positions for decades that eventually became standards for F-class. Their many-shot test groups were often in the same size range as mine.
Wanting to compare two receiver stiffness values in the verticle axis (Gale M.' vs me issue you keep harping about) by shooting the rifles they're part of in the wind? Please explain your reasoning. Why introduce an uncontrollable environmental variable to some usability feature that has nothing to do with the basic parts issue?