I suggested lock tight because it doesn't seem like he's planning on putting a different scope on the gun anytime soon.
A shop originally mounted the scope and it's worked great for years. Been dropped a few times, rolled around in the truck, just been beat on and still shoots where it was originally set. I love this scope even though it's fairly cheap. I want it to hold up like this again and not have how I tightened the rings be the problem.