Re: Custom Rifle Builders
I would suggest Robert Gradous at gradousrifles.com. He's extremely knowledgeable and his primary work is hunting rifles. He also can make high end tactical rifles. I sent him my REM 700 which was shooting about 1moa and now its .5moa after he fiddled with it. I'd wager if I got one of his full custom rigs, it'd be even better. They're pricey, but he has excellent service, skill, and only uses top end components.
Give him a call and he'll help you out.