I put a Nikon 1x4.5 DG series scope on my CZ 550 in 458 Lott. I noticed when I mounted the scope that it did not have goves cut into the weaver-style mounting slides, like many other guns. I just I did not pay enough attention to that. I used Weaver-style quick release mounts made by Leopold and made sure that the long-eye relief scope could not hit my head. I did not anticipated the scope coming off. I went to the range yesterday to shoot some new loads and at the first shot I was knocked to the ground and bleeding badly over my right eye. I left the gun, scope and everything on the bench (I was shooting from a standing position) for treatment. A minor concussion and no stitches were required but it hurts pretty bad. Has anyone had any similar experience with the CZ mounting system and what solutions do you have. It shoots very well with open sights and I may go that way from now on. But I really did want to scope this gun. Any suggestions would be appreciated. I would rather not get hit with a scope coming back at my head from a gun that generates more than 5,000 ft/pds of energy again. Once was enough. I guess it is also a good reminder to us all to check every aspect of our weapons before the shooting starts. Safety first! I have a concussion as a reminder (assuming I can remember anything in a couple of days) and doubt I will forget to double check everything before I take to the range or field again.