The extra velocity of the Norma ammo is not a significant factor in hunting whitetailed deer. If you are after moose or elk, then I would say it might be worth the extra $ only if you plan to shoot at ranges over 200 yards. If you want more punch in a factory whitetail load for the 6.5x55, IMO you would be a lot better off with Hornady's 129 grain interlock light magnum (LM) for about half the cost of the Norma.