A rifle scope that has 10 cm of eye relief is a must on a .300 Weatherby. A fixed 6 by 42 mm Leupold being one of my favorites because fixed power scopes are MUCH tougher and lighter than variable power riflescopes. The eye relief is about as good as it gets. A 3.5x 10 by 40 mm Leupold, a 2.5x 10 Nikon, and a 3x9 by 40 Zeiss Conquest are variable scopes I would trust on such a rifle. And they all have 10 cm of eye relief.