I cook at home and, with a lot of practice, have become able to very accurately estimate a half teaspoon, teaspoon or tablespoon of any given dry ingredient by pouring it into my cupped palm. So, I know that with a bit of practice, I could pour a reasonabley accurate charge of powder in the palm of my cupped hand. I would only resort to doing it that way if I were hunting and lost my measure. If I were shooting in a match, I'd go to my range box and get out one of my many measures to finish the match. Using a measure is the best way to get an accurate load but with a bit of practice, I could pour a hunting accuracy load using only the palm of my hand.