Well i finally went down to Wholesale Sports (formerly SW) and bought some of this stuff. Body sizing my 300 Ultra cases was giving me fits. I was using One Shot and they were still a real bugger. I would have to size them a little at a time working the lever up and down as many as a half dozen times to get a case sized and now and then it get a little stuck resulting shaking up the whole table un-sticking it.
I put some Imperial on a case and it was smooth as butter, and every one since also smooth as butter. It's a little messy to use... but not too bad. It's making life a whole lot easier with these RUM cases.
The One shot has worked fine on mys 300 WSM and 25-06, so I might still use it for those, but the Imperial is clearly a superior lube IME.