The present invention involves techniques for rapid, flexible, partial and supplemental reloading of firearms using specialized actions, intermediate storage devicesfeeds and multiple magazines, which may, in some embodiments, be simultaneously engaged with a firearm. The LGA socket is mounted to the power converter in a single direction of assembly. The ripples 24 have a stripe shape extending in a direction substantially perpendicular to the direction of sliding between the stamping tool and the workpiece material. A starting variable is selected.