Winchester Full Metal Jacket 9mmX21mm Ammo 124gr 50 Round Box - Brass Casing

Questions & Answers

• Q: Not for 9mm firearms? What firearm is this ammo for?

  • Answered
  • Asked 07/15/2021 05:19 by Tony B

  A:

  Tony, as Paul stated, they do make guns chambered in this caliber. As it is a rimless round, the 9×21mm is used in USPSA/IPSC competition in open class firearms. A rimless case is preferred because, unlike semi-rimmed or rimmed cartridges, it will not tend to lock together with other rounds in a double-column magazine, resulting in a malfunction. As other .38 Super–based rimless cartridges became available, the 9×21mm decreased in popularity in the United States for competition use, but it is still widely used in the rest of the world.

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