I was at the range with my unbraked 300 RUM the other day intending to start the sight in process with some 200 gr AB's at 3200 fps. The scope was a Leupold Vari X III 3.5-10x 40mm fixed objective. After the second shot it looked back through the scope at the target and the image was horribly blurry, as if I had taken the focus knob on a spotting scope and spun it way out of focus. Upon examination I saw no debris on the lenses or anything else that would have caused it, so I packed up and went home. I figured a lens had been jarred out of adjustment. When I got home, I looked through the scope again and the image was clear! What the heck? I called Leupold and the tech thought the same thing as I did about a lens, so off to Leupold it went Monday. I'm not sure I would trust just any company to tear into the scope to figure out the problem if it looked fine when viewing through it, but I am confident that Leupold will find the problem and fix it. I'm just glad it didn't happen in about 3 weeks when I will be out in Colorado trying to slay a cow elk.