Nothing special at all; the process and components are the same . On a single stage, like a MEC Jr, you deprime and resize at station 1, reprime at 2, drop powder, then insert wad and drop shot at 3, precrimp at 4, final crimp at 5.
If you are going to be using an autoloader, you will need to ensure that the last crimping station adds that bit of roundness for jam-free feeding.
At 3/4oz, you will get 533 loads from a bag of shot. I like the Claybuster wads; a LOT less expensive than AA, STS, or BPI and work just fine. Win AA hulls seem to be the best of the brands for 28 and 410. I found I needed to slow down just a little when loading smaller bores like 28 and 410 to prevent spills or cocked wads (unlike 12 and 20). On a single stage, that meant loading 4 boxes an hour as opposed to 5-6 for 12 or 20. Now, if you're also going to start doing a lot of clay shooting with the 28, a progressive might be in order, and there are several good ones to choose from - from the least expensive MEC Grabber to the Rolls Royce of loaders, the Spolar