Alliant Powder ®

Technically Superior by Design


  • A small, self-contained metallic ignition cap at the center of the base of the ammunition case
  • When struck by the firing pin, the primer combusts, sending sparks through the flashhole of the case, and ignites the powder charge
  • In centerfire cartridges, primers are cylinder-shaped components composed of ignition chemicals, a cup and an anvil
  • Some manufacturers color code their primers to assist in use and packaging
  • When reloading, spent primers are removed from the primer pocket and replaced with a whole new primer
  • Primers for rimfire ammunition, like some factory loads for .22 rounds, are contained in the hollow rim of the case; it is not recommended that you attempt to reload rimfire cases
Bullet | Case | Powder | Primer
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