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450 Bushmaster

Find 450 Bushmaster For Sale From Different Ammo Vendors

Discover a massive collection of 450 Bushmaster from top ammo retailers at Bulk Cheap Ammo. One-stop ammo directory for all ammo needs for Rifle, Handgun, Shotgun & Rimfire from various ammo vendors.

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.450 Bushmaster

  • Type Rifle
  • Place of origin United States
  • Production history
  • Designer LeMAG Firearms LLC
  • Manufacturer Bushmaster/Hornady


  • Parent case .284 Winchester
  • Case type Rebated rim, straight wall
  • Bullet diameter .452 in (11.5 mm)
  • Neck diameter .4800 in (12.19 mm)[1]
  • Base diameter .5000 in (12.70 mm)[1]
  • Rim diameter .473 in (12.0 mm)[1]
  • Rim thickness .054 in (1.4 mm)[1]
  • Case length 1.700 in (43.2 mm)[1]
  • Overall length 2.260 in (57.4 mm)[1]
  • Maximum pressure (SAAMI) 38,500 psi (265 MPa)

Ballistic performance

Bullet mass/type Velocity Energy
250 gr (16 g) SST 2,214 ft/s (675 m/s) 2,722 ft⋅lbf (3,691 J)
60 gr (17 g) AccuTip 2,180 ft/s (660 m/s) 2,744 ft⋅lbf (3,720 J)

We have listed top ammo brands like Winchester, CCI, Federal, Remington, PMC, Hornady, and more.

The .450 Bushmaster is a rifle cartridge developed by Tim LeGendre of LeMag Firearms and licensed to Bushmaster Firearms International. The .450 Bushmaster designed to be used in the standard M16s and AR-15s, using modified magazines and upper receiver assemblies.

The .450 Bushmaster descended from the "Thumper" concept popularized by gun writer Jeff Cooper. The .450 Bushmaster is a high-pressure rifle case, thus making efficient use of heavy .452" bullets.

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