Discover superior ballistic performance with our .300 Weatherby Magnum collection. From flat trajectories to high energy levels, explore the legacy of Roy Weatherby and experience the precision of magnum cartridges. Uncover your perfect match for hunting and long-range shooting with our diverse ammunition options today at bulkcheapammostore.com


Welcome to Bulk cheap ammo store, where quality meets firepower! Discover the peak of magnum performance with our exclusive collection of 300 Weatherby magnum ammo for sale online, crafted for hunters, avid shooters, and firearms enthusiasts. Our curated selection ensures you have access to top-quality ammunition that combines power and precision. Visit our online shop today Bulk Cheap ammo store to explore the legacy, power up your arsenal, and elevate your shooting experience with the .300 Weatherby Magnum series.


Regarding powerful and accurate ammunition, the Weatherby Magnum series stands out, with the .300 Weatherby Magnum and its high-performance counterpart, the 6.5-300 Weatherby Magnum, leading the pack. 

The .300 Weatherby Magnum is a cartridge renowned for its flat trajectory, impressive velocity, and superior energy. Developed by Roy Weatherby in 1944, this magnum cartridge is designed to deliver unmatched power and accuracy. It features a belted case and a distinctive double-radius shoulder, contributing to its excellent ballistic performance.

With bullet diameters typically ranging from .308 to .312 inches, the .300 Weatherby Magnum accommodates various bullet weights, making it a versatile choice for different applications. Whether pursuing big game, engaging in long-range shooting, or participating in competitions, this cartridge offers the precision and power needed to excel.


The .300 Weatherby Magnum has a rich history that traces back to the visionary mind of Roy Weatherby, an influential figure in the world of firearms and ballistics. Roy Weatherby, an American firearm designer, founded Weatherby, Inc. in 1945 to develop high-velocity, flat-shooting cartridges that would push the boundaries of ballistic performance.

The story of the .300 Weatherby Magnum began in 1944 when Roy Weatherby introduced this cartridge as one of his earliest magnum creations with the primary objective of designing a cartridge that combined tremendous power, flat trajectory, and superior accuracy for big-game hunting and long-range shooting. The .300 Weatherby Magnum was Weatherby’s response to the demand for a magnum cartridge that could outperform existing offerings in speed and energy.

The critical design elements of the .300 Weatherby Magnum include a belted case and a distinctive double-radius shoulder. The belted case helps ensure reliable and consistent feeding in bolt-action rifles, while the double-radius shoulder contributes to the cartridge’s unique appearance and aids in smooth chambering.

The cartridge’s performance is marked by high velocities and impressive energy levels, making it particularly effective for hunting large game at extended ranges. Shooters appreciated the .300 Weatherby Magnum for its ability to deliver flat trajectories and remarkable downrange energy, setting it apart as a go-to choice for those who pursue games in open terrain.

Over the years, the .300 Weatherby Magnum has earned a reputation as a versatile and powerful cartridge suitable for various applications, including hunting and long-range target shooting. The availability of a wide range of bullet weights and styles has contributed to its adaptability in different scenarios.

The success of the .300 Weatherby Magnum led to the introduction of other magnum cartridges in the Weatherby lineup, solidifying Weatherby’s reputation for producing high-performance ammunition. The legacy of Roy Weatherby and his commitment to innovation and excellence continue to influence the firearms industry, with the .300 Weatherby Magnum remaining a symbol of his pioneering spirit.

Today, the .300 Weatherby Magnum is still appreciated by hunters and shooters who seek power and precision. Its enduring popularity is a testament to its historical significance and ongoing relevance in the world of magnum cartridges.


  1. Case type; belted, bottleneck
  2. Parent case; .300 H&H Magnum 
  3. Case length; 71.8 mm (2.825 in) 
  4. Overall length; 90.5 mm (3.562 in ) 
  5. Bullet diameter; 7.8 mm. (308 in) 
  6. Shoulder diameter; 12.5 mm (492 in) 
  7. Base diameter; 13.0 mm (.512 in) 
  8. Neck diameter; 8.5 mm ( .366 in ) 
  9. Rim diameter; 13.5 mm (.531 in ) 
  10. Rifling twist; 1-10
  11. Primer type; Large rifle magnum
  12. Maximum pressure ; 65,000 psi (450 MPa


The .300 Weatherby magnum ammo has an impressive ballistic performance with typical weight loads ranging from 150 to 220 grains for muzzle velocities from 2,800 ft/s up to 3,500 ft/s. 


The .300 Weatherby Magnum ammo, available for sale online, is a powerful and versatile cartridge with various applications. Here are some common uses that make it a popular choice among shooters and hunters:

  1. Big Game Hunting:

The .300 Weatherby Magnum is renowned for its ability to take down large game animals effectively. Its high velocity and energy make it a preferred choice for hunting big and tough game species such as elk, moose, and bears.

  1. Long-Range Shooting:

Shooters who engage in long-range precision shooting appreciate the flat trajectory and retained energy of the .300 Weatherby Magnum. It offers excellent performance at extended distances, making it suitable for competitive shooting and target practice.

  1. Versatile Bullet Options:

The availability of a wide range of bullet weights and styles for the .300 Weatherby Magnum allows shooters to customize their ammunition based on specific needs. Whether for hunting or precision shooting, the versatility of bullet options enhances the cartridge’s adaptability to different shooting scenarios.

  1. Hunting in Open Terrain:

The .300 Weatherby Magnum’s flat trajectory and retained energy are advantageous for hunters operating in open terrains where longer shots are common. It gives hunters confidence in their ability to make ethical kills at extended distances.

  1. All-Weather Performance:

The .300 Weatherby Magnum is designed to perform well in various weather conditions, making it a reliable choice for hunters who may encounter diverse environments during their expeditions.


In conclusion, the availability of .300 Weatherby Magnum ammo for sale online caters to a broad spectrum of shooting enthusiasts, from hunters pursuing large games to precision shooters seeking long-range accuracy. The cartridge’s versatility, power, and Weatherby legacy make it a sought-after option for those looking to enhance their shooting experience.

Consider the .300 Weatherby Magnum for your next shooting adventure and experience the accuracy and precision in magnum performance. Place your order today and benefit from our exceptional offers. 

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