Here is the situation: I just got a 6TCU Bellm barrel in a trade. Mike counterbored a rim so it can use either .223 brass (shoots great), or I can use 5.6x50R brass. Well, I just got some of the rimmed stuff and Mike suggested you may be able to help with the proper procedure for forming. I know I'll have to trim some off, but don't want to screw up expensive brass. Already lost one just playing around. Can you help? This is by no means just for you, even tho Mike brought up your name, but for anyone who can dispense some advice.
Thanks, Jeff