@steven I batch all my primers for my target rifles by measuring primers' depth. I use a 21st Century priming tool to then seat the primers with a 1.5 preload and adjust the tool for each batch. CCI BR and Fed GM primers are reasonably consistent in depth measurement whilst the Fiocchi are not. Maybe the guys with misfires are seating to a constant depth in which case some primers may not be seating to the bottom of the pockets. If they are seating to feel probably no problems. Usual cause of misfires in a rifle in good condition is primers not seated correctly with anvils in contact with the bottom of the primer pocket. (You know all this already so excuse me appearing to try and teach you to suck eggs)At any rate I have found Fiocchi give good results with lowish ES and after using maybe 500 have never experienced a misfire in Barnards, my Omarks or my K31s.
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