I use an Opticron field scope for spotting when I'm on the range, and when shooting .22 smallbore in competition. It's a big, heavy, 'scope (ES 80 GA ED v3) and mounts on the side of an Opticron bipod. All the weight is on the standard screw that mounts the scope.
Halfway through a competition at the weekend, the scope fell off the mount - the threads on the scope had sheared... I was able to borrow a scope (not as good as mine) and continue, and despite not being able to see the fall of shot so well (and the extra stress) I still won my class...
I called Opticron on Monday to arrange to send the scope back for a warranty repair, as it is less than 6 months old. I sent it next day recorded. Got a call just now from Sarah at Opticron, who said that she had received the scope yesterday and replaced the mount.
She wanted to avoid the same problem coming up again, so she has also sourced me a tripod shoe and quick release plate, so that I will have a more stable fixing position!
Absolutely brilliant service from Opticron - I had been warned that they may not even consider it a warranty repair, and say that I had cross-threaded it, but there was no suggestion of that, and they were so keen to ensure that I got good service from the scope...
Looking forward to getting the scope back again tomorrow and trying out the new fitting!
I highly recommend both the scope, and the service from Opticron.