Bed the factory stock, it won't hurt the accuracy, if you do it properly. I'd be pretty happy with a rifle that, "shoots most of my handloads to .6moa", as you suggest this rifle does. Your rifle is a heavy barrel pig that was meant for varmint hunting. You shoot varmints from supported positions most times anyway, I don't see where cutting the barrel down would benefit you when the intended purpose of the rifle is to shoot it off the bench or from a bipod. It's not a walking varminter, it's a heavy rifle. I'd also be a little leery about dropping a $500.00 rifle into a $600.00 stock. What are you going to gain???
