I have the bulged barrel to prove it, yes, that claybuster was is made for the CF tapered case, and not for any straight walled hull. Powder will leak past the gas check and you will have bloopers. I was loading Universal, it leaks past.
I have a LEE Load All II in 16 and I wouldn't recommend buying it. I also would not get the 600 Jr. IMHO the Sizemaster is the way to go. I have one in 20 and another in 410. I have a set of dies for 12 as well. I still load my 12 on a 600 Jr, but am seriously thinking about an upgrade.
Also, IMHO, the adjustable bar is only OK in some scenarios, I've sold off all but one of mine. It works OK for 410. 410 is a fiddly shell to load, I just bought ammo after a while. I don't own a 410 now, and I own 2 410 reloaders. One is a vintage Redding that is almost LN, I should sell it, and was going to put it on the table at the next gunshow, that is now cancelled.
I loaded with the BP wad, the SG16S, and used either Universal or Unique. My game was yard vermin and the load did it's part.
I have a Winchester 1897 in 16 ga and it has a 2 9/16 chamber. I'm still looking for a hull that will roll crimp properly. Shortening the hulls is easy, getting a good roll crimp has not been as easy.
My next hull to try is a Fiocchi, Cheddites were a bust, of all things the brass turns on the hull, so the Russian roll crimper I bought does not work.
I have a LEE Loader in 16, I prefer it to my Load All.
I'm half tempted to go old school, and just use card and fiber wads.