I'm bringing this up as a new topic. I had one bite the dust today at the range. A long story but I managed to drop the scope last night as I was preparing for a morning at the range. Between dropping it and shooting off of a Lead Sled the Chinese scope died.
In a way I'm fortunate it died when it did. I'm being indecisive about which rifle to take deer hunting next weekend. I installed the scope at the range, bore sighted, 50 yards, 100 yards then moved it to 200. I set the 35 Whelen to go about 2 and a half high at 100 and two shots at 200 were nearly dead on. I was shooting 200gr handloads then loaded in factory 250gr to see the difference at 200. First shot a couple inches low and the second shot all I saw was a blur. Seems I had problems with the first shot with 250gr getting the eye relief right and had to adjust the eye piece to bring it back into focus. I shot it two more times via the ironsighter scope mounts and afterward nothing but a blur and I couldn't see the reticles. I have 6 of the Leupold clones, shot 3 other rifles today with the same type of scope today without any problems. Strange that the rifle with the least amount of recoil is the one that died. Today I shot 7MM, 300 and 338 mags. The 338's scope mounts came loose but after tightening it up. The zero was only a 4 or 5 clicks off but it appears I didn't get it level. So it will be back into the back yard in a rifle rest and bubble levels.
About a week ago my son and I shot his 300 Win mag off of a Lead Sled and his scope mounts came loose. I'm beginning to have my doubts about the Lead Sleds being rough on rifles. I've seen various gun board posting with tales of cracked stocks, loose scopes and screws backing out. As with a lot of internet chatter it is often "a friend of mine" and most mis-haps I've read about was somebody relaying what happened to somebody else. If I can find it I will post a 2-3 year old picture of my cracked stock shooting off of a Lead Sled. I blamed it originally on loose screws but possibly it was a combination of the Lead Sled and loose screws.