materials used in the RM watches all have their patent filed limits. Richard then subjects the watches to shock tests that far exceed the industry standard. I had heard that watches such as the RM027 were tested up to a 1000G. Seems improbably high, I grant you, but I am assured that such limits are tested.
I guess the short answer is that it depends on the watch. Some are made for higher limits than others. For example, the RM056 would probably not stand up too well to the same testing as the RM027!
Andrew H