I have seen on this forum and others, discussion of different brands and types of primers and their relative burn. However, the replys have always been links to other web sites that did not work for me. Does someone have a rosetta stone to primer power that could be posted here? Also, is there a general rule to US made brass? Specifically thickness, hardness, uniformness, durability, etc. I load PMC cases in 22-.250 and a guy at work told me that this brass is thicker than others. I know thinner brass = more case capacity, but does it also mean shorter case life?