Spent my spare time this weekend forming 300blk brass out of 223rem cases... Doing around 400 of them. Started cutting them at the shoulder of the 223 case which was about 1.411" , then backed it down to 1.388" . The last couple batches we're cut at 1.358" and those sized to 1.362" to 1.364" range. I even changed the blade in the mini-chop saw then killed my 12 year old Harbor Freight drill that I got for $10. Sacrificed an old Sears craftsman to the vice for trimming brass. Still have to champfer all the cases.