Shotgun reloading is typically done by payload weight. So, depending on the FPS and the payload you're shooting, you shouldn't have too hard of a time duplicating.
Now, assuming you can purchase the Hevi-Shot in the size you need, following a proper recipe and you should be good to go.
Just remember that unlike metallic reloading, there are typically no pressure "signs" and that you need to adhere to printed recipes. No substitutions. That goes for the hull, the wad, the powder, the primer and the weight of the payload. You can't "work loads up" and you'll want to pattern your reloads to ensure you're making a load that works well in YOUR gun.
