CCI Primers are continuously tested and improved. As a result today’s CCI primers are more sensitive, easier to seat and more compatible with progressive and automated loading equipment than ever before. They utilize modern non-corrosive and non-mercuric initiator mixes for the cleanest burn possible.Check your reloading manual or go to a powder manufactures website for load data.WARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov