I've been sizing AFTER PC'ing using Lee push thru sizers. My boolits are oversize so sizing some of my oversize boolits is a pretty good workout e.g. takes a lot of muscle to squeeze them thru the push thru sizer. I don't have any issues with my coating scraping off during sizing or flaking off after sizing. So, assuming you don't have issues with your PC bonding during sizing, why are you sizing before you PC? What is the benefit to doing this? - JJ