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A cartridge useful as an activator of other systems, and related method of manufacture. The cartridge's casing includes a fuse delimited by placing a plate at each end staked to the casing for fixing the fuse. This configuration permits precise control of the length of the fuse during manufacture, eliminates the need for separate structures in the casing to aid fuse location, and simplifies manufacture and assembly. This configuration supports the fuse lessening stresses that can lead to fractures. A portion of the casing is thinned by a preselected amount to permit fracturing of the casing to launch the projectile. The projectile may be attached to the cartridge casing more simply, e.g. by screw threading.