Okay, your first task is to STOP and read up about reloading. You are dealing with volatile components and mistakes can have serious implications. You can't just throw stuff together, although I imagine reloading for shotgun is lot more forgiving than rifle.
That said, once you understand the process it's awesome to get into. Get yourself a reloading manual (or two) and watch some youtube videos. ADI powders are available at most gun stores and they have a free to download booklet on all their powders, volumes of powders to use for different projectiles.
http://www.adi-powders.com.au/handloade ... on_WEB.pdf
CZ452 22lr | Remington 5R Milspec in .223 | Tikka Hunter in 300wsm | Ruger Scout in .308