Stan: Get ready for a lot of aggravation and frustration! The .410 is the most difficult shell to load successfully, and I never was successful in reloading any but Winchester, Remington and Federal hulls. The .410 is very sensitive to slight variations in hull length and strength. Over about 40 years of reloading the .410, I settled on Remington hulls, Winchester primers, Federal wads, WW296 powder, and magnum shot. I could have used WW AA hulls, but the loader must be set up for the hull being used, or you won't get good crimps. Using larger than 9 shot can be difficult on a progressive loader because the larger shot tend to bridge in the drop tube. The wads aren't very interchangeable either. A wad made for the old Winchester CF hull would allow the fine powder used in .410's to migrate past the wad in straight walled hull like Remington and Federal, resulting in bloopers. I have loaded many thousands of .410 shells because I like to practice skeet with them, and the above opinions are based on my experiences.
