Tasco's are bottom of the barrell IMO. You could always check out Millett, Falcon Optics Menace or Merlin series, SWFA Super Sniper, Bushnelle, Nikon, The more MOA of elevation the scope has, the better for shooting long range. A 10x scope is fine and an 16x, 18x, 22x or above will be plenty to see at long range.. Any of those scopes will get you to 400 yards easily and you dont need a high power scope for a 400 yard shot. The military used to, and may still use a 10x scope for out to 1000 yards.