Abstract: An improved magazine particularly useful for stacking concentrated or superconcentrated detergent cartons and a process for erecting such cartons and other stackable items. Manufacturing problems resulting from the presence of the handle in high density powder cartons can be reduced by use of a magazine or chute having curved side walls, which accommodate the fanning which normally occurs when the cartons are stacked. Flat tubular carton blanks are inserted, preferably horizontally, into a first carton opening in the magazine and travel therethrough to a second, preferably vertical opening in the magazine, where they emerge. The shape of the magazine accommodates the uneven stacking of the cartons which tends to occur because of the extra localized thickness contributed by the carton handle and the rivets. A case turner is provided for feeding cases of cartons into the magazine.