Encore28 is exactly right. A distributor that is willing to order enough rifles can have just about any configuration that he is willing to pay for. I have a Remington 700 Classic Stainless chambered for 257 Roberts. This is just one such example. I have also seen at many gun shows the Remington 700 ADL synthetic in calibers such as 257 Roberts, 25-06, 280, 300 WSM, and several other calibers not listed by Remington.