I noticed in the Wilson catalog that empty wt. for the full size KZ-45 is 31 oz. The same pistol loaded with 11 rounds is 43 oz. That's a difference of 12 oz. for the 11 rounds. In the same catalog, the empty wt. for the CQB and other single stack models is 38 oz. The same pistols loaded with 9 rounds is 44 oz. That's a difference of 6 oz. Something doesn't add up. Any ideas?