I use Lake city once fired from M855 rounds. I get them from our Base range. The AF has been using some frangible rounds lately and the brass head stamp is FC and has a crimped and red or blue sealant on the primer. I tied some out but didn't like it, the neck would crack during resizing on the first or second reload. I pretty much stick with lake city now. I bought a L E Wilson champher and deburring tool and with works great for primer crimp removal, it is razor sharp and only takes about one twist to completely remove it. One of these days I would like to get a dillon swager but that is about number 30 on my list of crap to buy.