You might find there is more to it than the barrel. I believe the Savage 110 is "long action" if it handles 270 Win. So, an internal magazine has to have feed rails; a detachable magazine usually has cartridge stops and feed lips. No guarantee that I know of that a 6.5x55 cartridge will feed from a 270 Win mag, without some attention. May or may not be major or minor, but likely needs to be addressed - likely shoulder stops within the magazine well, if it is a fixed magazine - not sure if a detachable 270 mag can be or even needs to be altered for 6.5x55. For sure a "short action" like a Savage 10, will not easily accommodate those in-between sizes like 6.5x55 or 7x57 - longer than 243/308 and shorter than 270 / 30-06. Also bolt face sizing - a 6.5x55 has several thou larger diameter rim than does a 270 Win - no doubt enough "slop" in existing one that it will work, but you will not have the same amount of extra room for that rim. It has been some years since I owned one, but I think the Savage 110 were like a push feed style with a recessed bolt face, but I could be mistaken on that. The one I had was a variation - called the 112V, at the time.
