That's like saying car manufacturers produce a car that can't be improved upon. The 338LM has already been greatly improved upon and since the military uses a 250gr bullet and a loose chamber is required, guess what Joe civilian is going to get. Also, for a $150 more, you can get a three way adjustable McMillan A5 rear spacer system, given the choice again, why wouldn't you want that, like that Ackley Improved chamber at no extra cost. Things like a threaded and contoured muzzle brake system and longer barrel. Not to mention a +20, +30 or +40 MOA rail and jewel trigger for the same money...
People blindly figure that if it's good enough for the military well then it's got to be good enough for civilian use. Snipers are shooting at man sized targets, not shooting for bulleyes and ultra tight groups. Theres a difference.
That's my take on production vs full custom for the same money.