I used to carry individual loads in plastic 35mm film cans. Shot was pre-measured along with wad and cards. Carried 10 in each pocket of my game vest. Measure powder, grab a can, remove lid, ram overpowder card and wad, drop the shot, and and then add the overshot card. Ram the whole mess down as a shot column. Drop the film can in the game pouch. It was pretty quick and easy instead of fumbling for individual components. 20 rounds was more than enough for a day's hunting, unless shooting doves.