Big Al, thank you, that is a good clear explanation of the difference. I just received my 2.75 inch 20 gauge hulls, so when I can find some shot that isnt way over priced, I will find out how well my Load All works. I dont have any shotguns that take 3 inch so that wont get tested and no steel shot for my old guns. I look forward to getting started.
My 410 reloading will be a different issue. I really dont want to pay the price for a MEC, so to start out I have been trying to buy 3 inch primed hulls, with no luck. I think I can load them without a press for the first time, and hope to have a sizing die to use my metallic press for the next reloadings. A few years ago, there was an outfit selling 410 dies for a regular press, so I think I am going to talk to a machinist friend about taking an old 06 die and making a 410 sizing die out of it. I believe that the 06 die is long enough to do the 3 inch shells.
It is all fun, and a learning experiment . Grant.