I had the same problem for a bit, The Federal primers appear to be a little hotter.
I worked up some of my 357 loads up with the Federal primers and did not get to the same max as with the CCI primers due to pressure signs. I guess the benefit to this is now I have tested loads for more than one brand of primer.
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"I ask, sir, what is the militia? It is the whole people except for a few public officials." George Mason
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