It'll probably survive just fine mounted on a .308 Winchester. I think most IORs will even survive on a 338 Edge or Lapua, provided the barrel doesn't have a muzzle brake. I experienced no problems with the 3-18x42mm on my 300 Win Mag - until after I installed a Holland muzzle brake on the barrel. The quality of the glass was great and the turret adjustments were accurate, so if the scopes don't come apart internally, they're really quite nice. I finally decided I was done packing around the extra weight on top of my carry rifles. Many people don't mind 30 to 38 oz scopes. My carry rifles weigh ~8 1/2 to 10 1/2 pounds - minus the scopes. As for me, reducing the scope weight by 1/2 lb or more makes packing my rifles much more tolerable, and my hunts more enjoyable. And to put this in context, virtually all of my hunting is backpack hunting in mountainous terrain, without the use of horses or all-terrain vehicles.