All HornadyA(R) Match(TM) bullets feature revolutionary AMPA(R) (Advanced Manufacturing Process) bullet jackets. Developed by HornadyA(R) engineers these bullet jackets are a technological advancement in design tooling and manufacturing that combine to produce the most consistently concentric bullet jackets available.These proven AMPA(R) jackets are the foundation for exceptional bullet accuracy and have virtually zero runout and near zero wall thickness variation. Coupled with precision swaged cores and manufactured to the tightest standards in the industry all HornadyA(R) Match(TM) bullets provide superior consistency high ballistic coefficients and unprecedented levels of accuracy.