12.7 x 42mm 700gr. Hard Cast “Omega”


Do you really take advantage of your AR’s potential?  It’s 50 caliber.  Half of an inch.  Now there’s a load that truly allows you to capitalize on that mystical bore diameter.

If you like to think outside the box, go to extremes, or just shoot heavy-for-caliber ammo…this load is for you.

Available on backorder

Email me when stock is available


This is Steinel’s heaviest option for your 12.7 x 42.  This brute of a projectile cycles, locks open on empty, and behaves the way a heavy-hitting AR-15 round should.  This shoulder-mounted artillery round hits on both ends.  It is a thrill to chuck this mass of lead downrange.

  • 700 grain LFNGC
  • 900 FPS (16″)
  • 1,259 Ft-Lbs
  • Feeds reliably – C.O.A.L of 2.236″
    • 50 Beowulf mags
    • 50 cal ASC (500 Auto Max) mags
    • 450 Bushmaster mags
  • New Starline brass
  • CCI Primer
  • Hodgdon premium powder

20 Rounds

Additional information

Weight 2 lbs
Dimensions 2.2 × 2.2 × 1.9 in