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It doesn't look like it would make much difference, the Federal primed rounds were only 14fps different from CCI primed rounds with the same powder charge, even though they were different projectiles...

Yes, not enough care and poor technique on my part when using a hand priming tool.
I have a healthy respect for primers after firing a primed case in my 223 about twenty years ago and seeing the...

Ha ha, I have a few 223 cases with the primer in sideways that I don't know what to do with!

So I stuffed up and primed some cases with Federal 210s instead of the CCI 200s I use in that calibre and have just finished load development with. I realised my mistake straight away, so started...