Hmmm. Federal .222 - see my thread of 4th June drawing attention to how short their cases are - once-fired all 30+ thou below the usual and now with a circular primer crimp. To be fair they neck-sized fine but primer insertion was a faff. No-one has explained why Federal has done this but I wonder has this anything to do with your problem? Interested to know what length they are before/after firing.
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They have police and military contracts therefore their .223 primer pockets are crimped, I guess their .222 is run on the same priming equipment so they get a crimp too.
