Had a 308 built with a CF barrel, Manners LR Hunter stock. It sets at 4 lbs.14 oz. The scope I want since I have 2 others on heavy rifles (zco 4-20) weighs 34 oz. I can go with the leupold mk 5 HD 3.6 to 18 which is 8 ounces lighter. The zco performance is great and I like leupold but will the 8 ounces make a difference on this rifle that I will hunt with?