A method of producing and filling a paperboard packaging container with bulk solids comprising the steps of: a) forming a tubular container body from a paperboard sheet, said container body having an upper end with an upper body opening and a bottom end with a bottom body opening (6") and a container body wall extending in a height direction of said packaging container between said upper body opening and said bottom body opening (6"), said container body wall having an inner surface and an outer surface, an upper end edge and an bottom end edge; b) attaching an inner partly or fully removable transport closure to said inner surface of said container body wall and/or sealing said upper body opening with a container lid and; c) presenting said container body to a filling station with said bottom body opening (6") of said container body directed upward in a vertical direction; d) filling bulk solids into said container body through said upwardly directed bottom body opening (6"); e) presenting said container body to a bottom body opening sealing station comprising at least one guiding member forming an, as seen from the bottom end, upwardly extending guiding channel, f) closing said bottom body opening (6") by pressing a bottom disc through said guiding channel and into said bottom body opening (6") such that a pressure above the ambient pressure is produced within said packaging container, the bottom disc having a peripheral flange surrounding a bottom disc base portion, said peripheral flange being flexed towards the bottom end in said height direction, wherein said guiding channel extends away from said container body,in said height direction, with a length L 1, as measured from said bottom end edge, wherein said bottom disc is pressed into said bottom body opening (6") with a length L 2 in said height direction, as measured between said bottom end edge and said bottom disc base portion and wherein the sum of L 1 and L 2 is at least 25 mm; g) attaching said flange to said inner surface of said container body wall by welding, wherein step g) is performed immediately after step f) while maintaining a pressure above the ambient pressure within said packaging container; and h) turning said container body such that said upper end is directed upwards in the vertical direction and said bottom end is directed downwards in the vertical direction, such that the bulk solids are compressed against the bottom disc under the combined influence of gravity and internal pressure in the container. a) forming a tubular container body from a paperboard sheet, said container body having an upper end with an upper body opening and a bottom end with a bottom body opening (6") and a container body wall extending in a height direction of said packaging container between said upper body opening and said bottom body opening (6"), said container body wall having an inner surface and an outer surface, an upper end edge and an bottom end edge; b) attaching an inner partly or fully removable transport closure to said inner surface of said container body wall and/or sealing said upper body opening with a container lid and; c) presenting said container body to a filling station with said bottom body opening (6") of said container body directed upward in a vertical direction; d) filling bulk solids into said container body through said upwardly directed bottom body opening (6"); e) presenting said container body to a bottom body opening sealing station comprising at least one guiding member forming an, as seen from the bottom end, upwardly extending guiding channel, f) closing said bottom body opening (6") by pressing a bottom disc through said guiding channel and into said bottom body opening (6") such that a pressure above the ambient pressure is produced within said packaging container, the bottom disc having a peripheral flange surrounding a bottom disc base portion, said peripheral flange being flexed towards the bottom end in said height direction, wherein said guiding channel extends away from said container body,in said height direction, with a length L 1, as measured from said bottom end edge, wherein said bottom disc is pressed into said bottom body opening (6") with a length L 2 in said height direction, as measured between said bottom end edge and said bottom disc base portion and wherein the sum of L 1 and L 2 is at least 25 mm; g) attaching said flange to said inner surface of said container body wall by welding, wherein step g) is performed immediately after step f) while maintaining a pressure above the ambient pressure within said packaging container; and h) turning said container body such that said upper end is directed upwards in the vertical direction and said bottom end is directed downwards in the vertical direction, such that the bulk solids are compressed against the bottom disc under the combined influence of gravity and internal pressure in the container.