Yeah, this is the tired old argument that always comes up....the lemming theory. By extension, the actual verifiable results of competition in hunter class before and after the custom rule can be applied to any form of short range registered Benchrest competition. IF the enhanced factory guns where actually capable of taking a top shooter to the top of the results board, then WHERE ARE THEY? As in any form of competition, there are always some who delight in competing with the minimalist concept of keeping it simple at the least cost by using "underdog" equipment - just to prove a point....yet virtually NO ONE shows up at tournaments, i.e. States, Regionals, or Nationals with one- much less competes with one.
For all you hot shots who think you can be a player with non-customs come out to matches and give it your best shot......IF you do well, then attend a tournament and if you do well there....you'll be the buzz of all the internet shooting chat rooms for months.... you will be a Daily Bulletin feature, you'll be a hero to the masses.....and maybe get sponsored by the action manufacturer.
FWIW, I've BTDT...I have 4 BR rigs, 2 customs and 2 based on Remington 700's (vey much enhanced). In 15 years of competition the customs are the only guns that have given me a win ...or at least put me at the top tier.....and I still campaign with all of them ...just to "try and prove the non-custom can compete"....well it hasn't happened yet and shows no signs of ever happening......but I'll still keep trying ....in the interest of scientific study