Our customer was bagging a very irregular product using a weigh scale automatic bagger. The density of the product was inconsistent resulting in about a third of bags being half full despite having the correct weight. Our customer used packaging with transparent panels and they felt that the half full bags reflected poorly on their brand. They solved this problem by discarding the partial bags and adding the product back into the bagger to be rebagged. This required an operator to manually inspect every bag.
Traditional volumetric fillers for dry goods are specialized, expensive, and difficult to find on the used market. They are not typically used on bagging lines.