.577 N.E. 3'' Load Data & Reloading Guide
Also known as: .577 Nitro Express, .577 N.E. 3 inch, .577 NE
About .577 N.E. 3''
The .577 Nitro Express 3-inch, introduced in the early 20th century, is a big-game hunting cartridge originally developed for African and Indian safari hunters. Created by combining the powerful black powder .577 Nitro Express with smokeless powder technology, it quickly became a favored cartridge for hunting large and dangerous game such as elephant and Cape buffalo. Its development was a response to the need for more efficient and reliable cartridges capable of delivering tremendous stopping power.
Technically, the .577 Nitro Express 3-inch is a rimmed, bottlenecked cartridge. It typically utilizes a bullet diameter of .584 inches, which contributes to its massive energy delivery. Standard bullet weights range from 750 to 750 grains, allowing it to achieve muzzle velocities around 2,050 feet per second, providing a significant energy transfer of over 7,000 foot-pounds. This immense stopping power makes it effective for dangerous game, ensuring deep penetration and energy retention.
From a reloading perspective, the .577 Nitro Express 3-inch offers unique challenges and satisfying opportunities. It requires careful selection of powders and primers to maintain safe pressure levels while optimizing performance. Reloaders must pay particular attention to consistent case dimensions and bullet seating depth to ensure reliable performance. Its large case volume provides flexibility in customizing loads to match specific hunting needs or recoil preferences.
The .577 Nitro Express 3-inch remains popular among serious hunters who require maximum stopping power for the most dangerous and resilient game. While its recoil is substantial, reloading enthusiasts appreciate the ability to tailor loads, balancing power and shootability. For those who embark on safari or face large game, it remains a quintessential option due to its proven track record and adaptability in reloading.
Technical Drawing

Technical Specifications
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Use our professional ballistics calculator to develop safe and accurate load recipes for .577 N.E. 3''.
Start CalculatingStandard Load Data — .577 N.E. 3''
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Frequently Asked Questions
The maximum pressure for .577 N.E. 3'' is 35,534 psi | 2,450 bar.
.577 N.E. 3'' typically uses a Large Rifle Magnum (LRM) primer.
The case capacity of .577 N.E. 3'' is approximately 185 grains of water (H₂O).