A method for manufacturing a metal container adapted to receive a dispensing valve assembly for dispensing a pressurized or aerosol product from the container, wherein said container is formed from two pieces of metal, including the steps of: providing a metal body component and a metal base component; rolling the metal body component into a generally tubular shape having two longitudinal proximate free edges (101, 103), and open top and bottom-ends; welding the longitudinal proximate free edges of the tubular shape to form a longitudinal weld seam, thereby forming a welded cylindrical body of a first diameter with open top and bottom ends; and forming the container by: forming and sealing the metal base component to the open bottom-end of the welded cylindrical body to form a closed container bottom; after forming the closed container bottom, sequentially applying a series of reducing diameter necking dies about an outer circumference of a top portion of the welded cylindrical body such that: the application of each necking die causes a diameter reduction such that an inwardly tapering shoulder portion having step-wise corner transitions between each diameter reduction is formed; and the application of a final necking die creates a constant diameter ending in a neck portion extending from the inwardly tapering shoulder portion, where the neck portion has a reduced second diameter relative to the first diameter of the welded cylindrical body; forming a curl at the open top-end of the neck portion, the curl being configured to receive a dispensing valve assembly for dispensing a pressurized or aerosol product from the container; wherein the weld seam extends continuously throughout the shoulder portion, neck portion, and curl. providing a metal body component and a metal base component; rolling the metal body component into a generally tubular shape having two longitudinal proximate free edges (101, 103), and open top and bottom-ends; welding the longitudinal proximate free edges of the tubular shape to form a longitudinal weld seam, thereby forming a welded cylindrical body of a first diameter with open top and bottom ends; and forming the container by: forming and sealing the metal base component to the open bottom-end of the welded cylindrical body to form a closed container bottom; after forming the closed container bottom, sequentially applying a series of reducing diameter necking dies about an outer circumference of a top portion of the welded cylindrical body such that: the application of each necking die causes a diameter reduction such that an inwardly tapering shoulder portion having step-wise corner transitions between each diameter reduction is formed; and the application of a final necking die creates a constant diameter ending in a neck portion extending from the inwardly tapering shoulder portion, where the neck portion has a reduced second diameter relative to the first diameter of the welded cylindrical body; forming a curl at the open top-end of the neck portion, the curl being configured to receive a dispensing valve assembly for dispensing a pressurized or aerosol product from the container; wherein the weld seam extends continuously throughout the shoulder portion, neck portion, and curl. forming and sealing the metal base component to the open bottom-end of the welded cylindrical body to form a closed container bottom; after forming the closed container bottom, sequentially applying a series of reducing diameter necking dies about an outer circumference of a top portion of the welded cylindrical body such that: the application of each necking die causes a diameter reduction such that an inwardly tapering shoulder portion having step-wise corner transitions between each diameter reduction is formed; and the application of a final necking die creates a constant diameter ending in a neck portion extending from the inwardly tapering shoulder portion, where the neck portion has a reduced second diameter relative to the first diameter of the welded cylindrical body; the application of each necking die causes a diameter reduction such that an inwardly tapering shoulder portion having step-wise corner transitions between each diameter reduction is formed; and the application of a final necking die creates a constant diameter ending in a neck portion extending from the inwardly tapering shoulder portion, where the neck portion has a reduced second diameter relative to the first diameter of the welded cylindrical body; forming a curl at the open top-end of the neck portion, the curl being configured to receive a dispensing valve assembly for dispensing a pressurized or aerosol product from the container; wherein the weld seam extends continuously throughout the shoulder portion, neck portion, and curl.