Check the magazine frequently. The rotor must move freely and have adequate tension so that each cartridge is quickly raised to the feeding position. At the time of manufacture, proper rotor tension is set by rotating the magazine cap nut until the rotor stops turning. Then the nut is turned an additional 1 1/4 turns beyond the 'stop' position.
To test the rotor tension, load one cartridge into the magazine and then firmly press against the side of the cartridge case. Remove your finger quickly. The cartridge should instantly and fully move in to the feeding position. If it does not, the magazine should be cleaned. If cleaning does not restore proper rotor tension, do not use the magazine. (NOTE: After testing, remove the test cartridge).
When cleaning is necessary, use a solvent that will not rust the metal components or adversely affect the plastic magazine box. After the magazine has been soaked in solvent to loosen foreign matter, be certain to shake it vigorously (with the loading opening away from you) to remove solvent or residue from within the magazine.
After cleaning, always check to be certain that rotor movement and tension are correct, and that no solvent or debris remain. Do not disassemble the magazine. Improper reassembly or improper tensioning of the rotor spring can cause a potentially dangerous malfunction. If you experience a problem with the magazine, don't use it. Get a new one.
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