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I think Shooting Times ran an article by Lane Pierce regarding CCI primers having a harder cup compared to others such as Federal. This was, at one time, true. But he stated this was some time ago and they've since changed the makeup of the cups and are not much harder, if any at all. He mentioned it was an issue that some reloaders took and spread like wildfire. Even though CCI remedied the cup hardness, the percieved "damage" was done.
Do I personally think CCI is still made with a harder cup? I don't know. When I use them it does seem that my firing pins don't make quite the indentation as, say, Federals. But I haven't really investigated/experimented enough to draw my own conclusion.
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