The only problem with the Lee Loader is they do not make a .410 loader (or 28ga) and have no plans to do so. I find this odd as these are the two gauges where you can save the most money.

For 12ga though - though some people look down on it, the Lee Load All is very good value for money at around £75 and with a conversion kit (around £30) you can load 20ga or 16ga.

If you are doing this to save money - you should really do the maths though - quite often reloading shot-shell does not make economic sense - particularly if your time isn't worth £0.