Yeah, I made one too. Works like a charm.JD....I also have custom shims in .003 and .004" for just that very thing. Not many though.
Lapriester over at the CMP forum made a very inexpensive barrel shoulder rolling apparatus from a Harbor Freight pipe cutter. Replace the wheels with a kit from Lowes and you have your own shoulder roller. I've also gained some draw with an anvil and ball peen hammer. Easy enough really.
Takeoffs can be a pain like that sometimes.