Being the frugal type we tend to be on this site I though I would pass in a easy and simple way I made a little do dad for removing the primer crimp on a box load of 223 brass I just got . Yeah there's lots of ways drill bit , counter sink , ect I always used a drill bit but never liked the angle it cut so I went poking around looking for something else and I found a 1/4 drive philips head driver bit . The angle fit well at just cut the crimp out and not a lot of the pocket or the case head . Just needed to sharpen it up some so it cut well. I heated it up with a propane torch to a aneal it as it's very hard as is . Just used a small file and beveled the top of the four splines so they were sharp on the left hand edge . I just chuck it up in my cordless drill and pull the trigger as a press the primer pocket into it . Costs nothing as we all have a few extra bits laying around .Hope this may help someone with this unpleasant task of brass prepping military cases .
Tim