The Winchester Supreme Elite PDX1 Person Defense line of shotgun ammunition represents the combination of two excellent personal defense technologies - Winchester's unique Grex buffered copper-plated shot and the black oxide high-base head of the PDX1 design. Simply put, these personal defense loads are equipped to deliver ultimate threat-stopping power at both short and long range. Best of all, these shells are backed by the 140 years of experience of all Winchester products, not to mention the company's commitment to quality.