I use Remington, any of them will load using the same data. Winchester AAs are also tapered like the Remingtons, but the other Winchesters are NOT. Euro hulls like Fiocchi, RIO and Cheddites are straight-walled hulls and require wads designed for straight-walled hulls. Federals are straight-walled and most Euros and Federals will take the same wad.
Where I used to live my club bought all of their targets from Gamaliel in Kentucky and so when we wanted reloading supplies, we went through the club and the stuff was just added onto the truckload of targets. This saved us LOTS on shipping and hazmat fees. You might see if a local club does something like that as well, or if there is a group of guys you can go in on a bulk purchase of powder, primers, wads and shot - that will help save money as well.
When I buy, I buy primers by the sleeve of 5,000, wads by the case of 5,000 and powder in 8# jugs - 2/case.