Here is a thought. I have seen some exceptional accuracy from friends' slow twist 6BRs, groups in the high ones and low twos with a careful workup was done with custom bullets. These are high quality builds, in one case on a Panda, the other on a fully blueprinted Remington, that has a sleeved bolt. I am not sure that there would be any advantage to using the 6PPC in a Savage, given that that caliber's accuracy is so close to a well built slow twist 6BR at the closer distances. Of course the advantage of the 6BR is that you don't need to modify a bolt head, or fire form brass. One fellow that I know that has shot benchrest for years, told me some years ago, that he once had used a 6BR to compete in short range benchrest matches. Before and after that he shot a 6PPC. He said that it had been competitive. If the difference in accuracy is that close in a custom actioned benchrest rifle, I doubt that it would be discernible in anything less, and before you get defensive about Savages, I have owned several, and like them, but I have never seen one that would run well in a sanctioned benchrest group match of any size.