Hello All, I am new to the forum, but not to shooting. I have a 270 WBY Mag, Mark V Sporter, sitting in the closet taking up space. I am considering another long range gun and wanted to turn this into a custom. I am looking for something unique, however, easy to convert. I understand for the most part WBY's case are some what similar and would be easy to go up or down in caliber. Not that there is anything wrong with the 270, however, not something I want any more. The rifle means to much to me to get rid of it. I would imagine the .257 would be a nice conversions or go on the high end of a 7mm/300. I currently shoot a .300 Remington Ultra Mag which is very accurate, so I do not know if I want another of that similarity. If I were to go on the larger end of calibers, I am looking at the 338 Laupa! So I don't know, I am just throwing it out there for some other insight! Thanks for your help!