Last year, when I was working with Leupold on the Delta Point Pro, they were testing a Pro on their accelerated testing machine, and broke the two screws holding the optic to the fixture. Today, my wife was checking zero on a C More RTS 2 mounted to a 320 Legion, using a Springer Precision plate, when the zero seemed to move three inches. We looked at the optic and realized not one but BOTH screws attaching the C More to the Springer plate had sheared. We had recently mounted this optic to replace a defective Romeo 3 Max and had reused the Springer screws. Pictures below.
Moral of the story is to not reuse screws when replacing an optic, as they are a potential weak link. The sheared screws ruined the Springer plate, but that is better than if the optic was direct milled, and they sheared in the slide.