Odd. I was 5-for-5 this past year with three shots around the 25yd range using 140gr CoreLokt with my .260 and none ran over ~10yds. All five were pass-through with what looked to be great terminal performance. I posted my experiences up in the hunting forum. TBH, though, from 120gr up to 160gr (if you load that heavy) should be fantastic on whitetails with the .260 (or 6.5x55SE). I think it'd be more difficult to find a bad combo than a good combo