You will have to forgive me for my ignorance on this subject as I'm not really a bolt action guy. A friend of mine has a Remington 700 chambered in 6mm Remington. He loves the rifle as it belonged to his Dad but he wants to rebarrel it to a more common caliber. Is it possible to rebarrel to a long action caliber like .270 Win and what other parts need to be replaced? Bolt and receiver as well?? All input is appreciated. Thanks.