I really feel you need to "get your feet wet" by succesfully loading standard birdshot ammo first. I loaded shotshells for over 20 years before I tackled buckshot. I will not share any recipes with a novice as there are too many variables that you need to get a better understanding of before moving on to "advanced" loading.
WTS, the bushing controls the amount of powder dropped on a MEC loader. Read the instructions and learn the loader, PLEASE!
In life, strive to take the high road....It offers a better field of fire.
"Robo is right" Fuzzball