500 Auto Max 414gr. Brass Spike


In Stock
  • 20 rounds
  • New Starline brass
  • Hodgdon Powder
  • 1,620 FPS (18″)

A perfect way to capitalize on the baddest AR in existence.

In stock


This is THE big bore AR cartridge for pure power.  The 500 Auto Max, fired from the Big Horn Armory AR500, is capable of taking any game, anywhere.  This is our first premium load for this cartridge and it is incredible.

This Steinel load uses our own 414 grain solid brass spire point.  Tolerances are incredibly tight on these solid brass bullets and result in single digit velocity standard deviation.

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20 Rounds

Check out Big Horn Armory’s AR500

Big Horn Armory 500 Automax Ammo


Additional information

Weight 1.56 lbs
Dimensions 2.4 × 3.1 × 2.3 in