I suppose with the GC crimped on and for example 35,000 psi on the base of the boolit, it would be hard for the GC to rotate on the boolit's base. I see where the rifling marks on GCs from recovered boolits. The GC is usually made of copper, aluminum, and such. So my question is, besides the GC protecting the base of the boolit, is there any statistical data on how it supports or adds tensile strength or shear strength to the boolit?