Ya'll are making a huge deal out of something that isn't. If he wants to shoot out to 250yards, that gun will do it just fine. NO one is saying anything about ridiculous hold over. Everyone that mentioned hold over so far is still aiming on the deers chest, just in the upper portion. 260yards is just fine assuming he holds good groups at 100. The OPs question was if his rifle was capable of that and if others have taken deer that far with a .270. The answer is yes.
-Jake