I second the motion that WEIGHTED DOWN LEAD-SLED'S can damage a scope. My friend lost his Leupold VX3 CDL Boone and Crockett 4.5-14 or something like that when he borrowed my lead sled. He somehow got the idea that he would drill holes in the tubing, then screw the sled down (in 6 places) to keep it from moving. THEN HE TAPED THE RIFLE DOWN INTO THE SLED. I was wondering how he blamed my rifle rest for hurting his scope. (as he borrowed the rest, I wasn't with him when he did any of the drilling!!!) , only a few days later did I see the holes he drilled in the tubing. (one of which bisected one of the rubber feet, splitting it). When I told him what an idiot he was , he still didn't get it. I told him I never weigh my sled down. I let it recoil, and I take it. It is used mainly so I can hold the crosshairs steady on a bullseye and make incremental changes while still shouldering the rifle. I said that if you lock a .300WSM down and do not allow it to recoil, SOMETHING is gonna break................either the scope, or the stock.
I don't let him borrow any of my stuff anymore.