I don't think you have damaged the scope. It is possible but I doubt it. The spec is 30 in on the base and 20 in on the ring caps. I don't know why they have not corrected the packaging. When I first started mounting scopes I used to mount the Zee rings to the 30-35 spec on the package and never saw an issue with any mechanics, optics, or damage to the tubes. If they did cause an issue I would certainly call Burris immediately. They have pretty customer service.