I bought one years ago for loading steel. Has a rubber insert on the shot side.
Must admit, I had a hard time adjusting it properly, but after getting use to it, it worked out fine. Now having said that, I'm not going to get rid of my regular bars or powder insert bushings either. They're much quicker to use. Course, you must have a weight scale to check both the adjustible bar and as the powder bushings are always off, for those too, if you want to be picky about your shot reloads. I have always found them to be short at least by a grain, if not more. So Far.