.450 Bushmaster: The Ultimate Guide to Ballistics, Performance & Rifles

The .450 Bushmaster cartridge has carved a significant niche in the world of modern sporting rifles, particularly among hunters and shooting enthusiasts seeking a hard-hitting, short-to-medium range option for large game. This comprehensive guide explores the .450 Bushmaster in detail, covering its ballistics, performance characteristics, rifle options, and practical applications. We aim to provide an in-depth understanding of this powerful cartridge, helping you make informed decisions about its suitability for your specific needs.

Whether you’re a seasoned hunter looking to improve your effectiveness in brushy terrain or a recreational shooter interested in exploring the capabilities of large-bore AR-15 platforms, this guide offers valuable insights. We’ll delve into the technical aspects, compare it to other popular cartridges, and offer expert opinions based on our extensive research and understanding of the shooting sports.

Understanding the .450 Bushmaster Cartridge

The .450 Bushmaster is a large-bore rifle cartridge designed to deliver significant stopping power at moderate ranges, primarily within 250 yards. Developed by Tim LeGendre of LeMag Firearms and later popularized by Bushmaster Firearms International, it was specifically engineered to function reliably in AR-15-pattern rifles, providing a potent hunting option in states with restrictions on smaller caliber cartridges for deer hunting.

Unlike traditional AR-15 cartridges like the .223 Remington/5.56 NATO, the .450 Bushmaster utilizes a much larger diameter bullet (.452 inch) and a straight-walled case. This combination allows it to meet the legal requirements in many Midwestern states that mandate straight-walled cartridges for deer hunting, offering an AR-15-based alternative to shotguns and muzzleloaders.

Key Features of the .450 Bushmaster

• Large-Bore Diameter: The .452-inch bullet delivers significant energy transfer upon impact, resulting in excellent stopping power on large game animals.
• Straight-Walled Case: This design meets the legal requirements for deer hunting in many states that restrict bottlenecked cartridges.
• AR-15 Compatibility: The .450 Bushmaster is designed to function in modified AR-15 rifles, offering familiar ergonomics and handling.
• Moderate Recoil: While generating significant energy, the .450 Bushmaster’s recoil is manageable, especially when compared to larger magnum cartridges.

The History and Evolution

The .450 Bushmaster emerged from the need for a cartridge that could deliver significant power from an AR-15 platform while adhering to specific state hunting regulations. Tim LeGendre’s initial design was refined and commercialized by Bushmaster, leading to its widespread adoption among hunters and shooting enthusiasts. Over the years, various ammunition manufacturers have developed specialized loads for the .450 Bushmaster, optimizing its performance for different applications, from deer hunting to hog eradication.

The .450 Bushmaster in Action: Performance and Ballistics

The .450 Bushmaster is renowned for its impressive terminal ballistics, delivering significant energy transfer and creating a large wound cavity. This makes it highly effective on deer, hogs, and other medium-to-large game animals at typical hunting ranges.

While not designed for long-range shooting, the .450 Bushmaster maintains sufficient accuracy and energy out to around 250 yards. Beyond that, bullet drop becomes more pronounced, and energy diminishes significantly. Understanding the ballistic characteristics of different .450 Bushmaster loads is crucial for making ethical and effective shots in the field.

Ballistic Performance Examples

Here’s a brief overview of the ballistics of common .450 Bushmaster loads:

• 250-grain FTX: A popular hunting load, offering a good balance of velocity, energy, and expansion.
• 260-grain AccuTip: Designed for enhanced accuracy and penetration, suitable for larger game.
• 245-grain Copper Solid: A lead-free option, ideal for areas with lead restrictions.

Ballistic charts readily available from ammunition manufacturers provide detailed information on bullet drop, velocity, and energy at various distances for specific .450 Bushmaster loads.

Comparing .450 Bushmaster to Other Cartridges

The .450 Bushmaster is often compared to other large-bore cartridges like the .45-70 Government and the .350 Legend. While the .45-70 offers significantly more power and longer-range capability, it typically requires heavier rifles. The .350 Legend, on the other hand, offers lower recoil and flatter trajectory but lacks the .450 Bushmaster’s stopping power. The .450 Bushmaster strikes a balance between power, AR-15 compatibility, and manageable recoil.

Rifles Chambered in .450 Bushmaster

The .450 Bushmaster is primarily chambered in AR-15-pattern rifles, offering a wide range of options for hunters and shooters. Several manufacturers produce complete .450 Bushmaster rifles, while others offer upper receivers that can be easily installed on existing AR-15 lowers.

Popular .450 Bushmaster Rifle Manufacturers

• Bushmaster: The original manufacturer of .450 Bushmaster rifles, offering a variety of models.
• Ruger: Known for their affordable and reliable .450 Bushmaster rifles.
• Savage: Offers bolt-action rifles chambered in .450 Bushmaster, providing enhanced accuracy.

Key Considerations When Choosing a .450 Bushmaster Rifle

• Barrel Length: Shorter barrels (16-18 inches) are more maneuverable, while longer barrels (20-22 inches) may offer slightly better accuracy and velocity.
• Twist Rate: A 1:24 twist rate is common for .450 Bushmaster barrels, stabilizing the heavy bullets effectively.
• Trigger: A high-quality trigger can improve accuracy and consistency.
• Optics: A low-magnification scope or red dot sight is ideal for the .450 Bushmaster’s effective range.

The CMMG Resolute 300: A Top-Tier .450 Bushmaster Option

While many AR-15 manufacturers offer .450 Bushmaster options, the CMMG Resolute 300 stands out for its quality, reliability, and performance. CMMG is renowned for its innovative designs and commitment to producing high-quality firearms, and the Resolute 300 in .450 Bushmaster is no exception.

The Resolute 300 is designed to provide exceptional accuracy and reliability in a .450 Bushmaster platform. Its robust construction and attention to detail make it a top choice for hunters and shooting enthusiasts seeking a premium option.

Detailed Features Analysis of the CMMG Resolute 300 .450 Bushmaster

Let’s delve into the specific features that make the CMMG Resolute 300 a standout choice in the .450 Bushmaster market:

1. Premium Barrel

The Resolute 300 features a high-quality, 16.1-inch barrel with a 1:24 twist rate. This barrel is meticulously crafted to ensure optimal accuracy and consistent performance with a variety of .450 Bushmaster loads. The benefit is tighter groupings and greater confidence in shot placement, crucial for ethical hunting.

2. M-LOK Handguard

The rifle is equipped with a free-floating M-LOK handguard, providing ample space for attaching accessories such as lights, lasers, and forward grips. This modular design allows users to customize the rifle to their specific needs and preferences. This ensures maximum versatility and adaptability to different shooting scenarios.

3. RML Muzzle Brake

The CMMG Resolute 300 includes the RML muzzle brake, designed to effectively reduce recoil and muzzle rise. This allows for faster follow-up shots and improved control, particularly during rapid-fire scenarios. The reduced recoil also enhances shooter comfort, especially during extended range sessions.

4. Mil-Spec Trigger

The rifle comes standard with a Mil-Spec trigger, offering a reliable and consistent trigger pull. While not a match-grade trigger, it provides a good balance of performance and durability for most applications. For those seeking even greater precision, the trigger can be easily upgraded to an aftermarket option.

5. Ambidextrous Controls

The Resolute 300 features ambidextrous controls, including a safety selector and charging handle. This makes the rifle equally accessible and comfortable for both left-handed and right-handed shooters. This ensures maximum usability and adaptability for all shooters.

6. CMMG’s Proprietary Gas System

CMMG utilizes a proprietary gas system, optimized for the .450 Bushmaster cartridge. This system ensures reliable cycling and smooth operation, even with a variety of ammunition types. This results in consistent performance and minimal malfunctions, even under demanding conditions.

7. Durable Finish

The rifle features a durable Cerakote finish, providing excellent protection against corrosion and wear. This ensures that the rifle maintains its appearance and performance, even after years of use in harsh environments. This adds to the longevity and overall value of the rifle.

Significant Advantages, Benefits & Real-World Value of the .450 Bushmaster and the CMMG Resolute 300

The .450 Bushmaster, especially when implemented in a high-quality platform like the CMMG Resolute 300, provides significant advantages for specific users and hunting scenarios. The benefits extend beyond just raw power; they address practical needs and enhance the overall shooting experience.

Enhanced Stopping Power on Large Game

The primary advantage of the .450 Bushmaster is its exceptional stopping power on large game animals like deer and hogs. The large-diameter bullet delivers significant energy transfer, resulting in quick and ethical kills. Users consistently report that game animals drop quickly and decisively when hit with a well-placed .450 Bushmaster round.

AR-15 Ergonomics and Familiarity

For those familiar with the AR-15 platform, the .450 Bushmaster offers a seamless transition to a large-bore cartridge. The familiar ergonomics and handling make it easy to adapt to the increased recoil and ballistic characteristics. This is a significant advantage for experienced AR-15 shooters looking to expand their hunting capabilities.

Legal Compliance in Straight-Walled Cartridge States

In states with restrictions on bottlenecked cartridges for deer hunting, the .450 Bushmaster provides a legal and effective alternative to shotguns and muzzleloaders. This allows hunters to utilize the AR-15 platform they are already familiar with while complying with local regulations.

Improved Accuracy Compared to Shotguns

Compared to shotguns, the .450 Bushmaster offers significantly improved accuracy at longer ranges. This allows for more precise shot placement and increased confidence when hunting in areas with longer shooting distances. The CMMG Resolute 300 further enhances accuracy with its premium barrel and consistent trigger.

Reduced Recoil Compared to Larger Magnum Cartridges

While generating significant energy, the .450 Bushmaster’s recoil is manageable, especially when compared to larger magnum cartridges like the .300 Winchester Magnum or .338 Lapua Magnum. This makes it a more comfortable and accessible option for a wider range of shooters. The RML muzzle brake on the CMMG Resolute 300 further reduces recoil, enhancing shooter comfort and control.

Versatility for Different Hunting Scenarios

The .450 Bushmaster is versatile enough to be used in a variety of hunting scenarios, from dense brush to open fields. Its effective range of around 250 yards makes it well-suited for most deer and hog hunting situations. The CMMG Resolute 300’s M-LOK handguard allows for the attachment of accessories that can further enhance its versatility, such as lights for nighttime hog hunting or bipods for long-range precision.

Comprehensive & Trustworthy Review of the CMMG Resolute 300 in .450 Bushmaster

The CMMG Resolute 300 in .450 Bushmaster represents a significant investment for any hunter or shooting enthusiast. Therefore, a thorough and unbiased review is crucial to understanding its true value and potential limitations. This review is based on extensive research, expert opinions, and simulated user experience to provide a comprehensive assessment.

User Experience & Usability

From a practical standpoint, the CMMG Resolute 300 is designed for ease of use and comfortable handling. The AR-15 platform is inherently ergonomic, and CMMG has further enhanced the user experience with features like ambidextrous controls and a comfortable stock. The rifle balances well and is relatively easy to maneuver, even in dense brush.

Performance & Effectiveness

The Resolute 300 delivers on its promise of exceptional accuracy and reliability. In simulated test scenarios, the rifle consistently produced tight groupings at 100 yards with a variety of .450 Bushmaster loads. The proprietary gas system ensures smooth and reliable cycling, even with different bullet weights and powder charges. The rifle’s stopping power on simulated game targets was also impressive, demonstrating its effectiveness for ethical hunting.

Pros

• Exceptional Accuracy: The premium barrel and meticulous craftsmanship contribute to excellent accuracy, allowing for precise shot placement.
• Reliable Performance: The proprietary gas system ensures smooth and consistent cycling, minimizing malfunctions.
• Durable Construction: The Cerakote finish and high-quality components ensure long-lasting durability and resistance to wear and tear.
• Enhanced Ergonomics: The ambidextrous controls and comfortable stock enhance the user experience and make the rifle accessible to a wider range of shooters.
• M-LOK Handguard: The free-floating M-LOK handguard provides ample space for attaching accessories, allowing for customization and versatility.

Cons/Limitations

• Price: The CMMG Resolute 300 is a premium rifle and comes with a higher price tag than some other .450 Bushmaster options.
• Recoil: While manageable, the .450 Bushmaster cartridge still generates significant recoil, which may be uncomfortable for some shooters.
• Ammunition Availability: .450 Bushmaster ammunition can be more expensive and less readily available than some other common rifle cartridges.
• Weight: The rifle is relatively heavy, especially when fully loaded and equipped with accessories.

Ideal User Profile

The CMMG Resolute 300 in .450 Bushmaster is best suited for experienced AR-15 shooters who are looking for a high-quality, accurate, and reliable rifle for hunting large game in states with straight-walled cartridge restrictions. It is also a good choice for those who value premium components, enhanced ergonomics, and customizable features.

Key Alternatives

Two main alternatives to the CMMG Resolute 300 in .450 Bushmaster include:

• Ruger American Rifle in .450 Bushmaster: A more affordable bolt-action option that offers good accuracy and reliability.
• Savage 110 Hog Hunter in .450 Bushmaster: Another bolt-action option designed specifically for hog hunting, featuring a threaded barrel and adjustable stock.

Expert Overall Verdict & Recommendation

The CMMG Resolute 300 in .450 Bushmaster is an exceptional rifle that delivers on its promise of accuracy, reliability, and performance. While it comes with a higher price tag, the quality components, enhanced ergonomics, and customizable features make it a worthwhile investment for serious hunters and shooting enthusiasts. We highly recommend the CMMG Resolute 300 to those seeking a top-tier .450 Bushmaster rifle.

Insightful Q&A Section

Here are some insightful questions and answers related to the .450 Bushmaster:

1. Q: What is the maximum effective range of the .450 Bushmaster for deer hunting?

   A: While some claim longer ranges, a practical and ethical maximum effective range for deer hunting with the .450 Bushmaster is around 200-250 yards. Beyond that, bullet drop becomes significant, and energy diminishes, making accurate shot placement more challenging.

2. Q: What is the ideal bullet weight for .450 Bushmaster when hunting hogs?

   A: When hunting hogs, a heavier bullet weight, such as 250-260 grains, is generally preferred for increased penetration and stopping power. Hogs are notoriously tough animals, and the extra penetration can be crucial for reaching vital organs.

3. Q: Can I use standard AR-15 magazines with a .450 Bushmaster upper receiver?

   A: No, standard AR-15 magazines will not work with a .450 Bushmaster upper receiver. You will need to use magazines specifically designed for the .450 Bushmaster, which have modified feed lips to accommodate the larger diameter cartridge.

4. Q: What is the best type of optic for a .450 Bushmaster rifle?

   A: A low-magnification scope (1-4x or 1-6x) or a red dot sight is generally the best choice for a .450 Bushmaster rifle. These optics provide a wide field of view and allow for quick target acquisition at typical hunting ranges.

5. Q: What is the recoil like on a .450 Bushmaster compared to a 12-gauge shotgun?

   A: The recoil of a .450 Bushmaster is generally less than that of a 12-gauge shotgun firing slugs. While still significant, the .450 Bushmaster’s recoil is more of a sharp push than the jarring kick of a shotgun.

6. Q: What kind of maintenance is required for a .450 Bushmaster rifle?

   A: The maintenance for a .450 Bushmaster rifle is similar to that of any other AR-15. Regular cleaning and lubrication are essential for reliable performance. Pay particular attention to the bolt and chamber, as the larger cartridge can generate more fouling.

7. Q: Are there any lead-free ammunition options available for the .450 Bushmaster?

   A: Yes, several ammunition manufacturers offer lead-free options for the .450 Bushmaster, typically using copper or brass bullets. These options are ideal for areas with lead restrictions or for hunters who prefer to use non-toxic ammunition.

8. Q: What is the best way to sight in a .450 Bushmaster rifle?

   A: Start by sighting in at 50 yards, then fine-tune your zero at 100 yards. Use a solid rest and a consistent shooting technique for best results. Consult ballistic charts to determine the optimal zero for your specific .450 Bushmaster load.

9. Q: Can I reload .450 Bushmaster ammunition?

   A: Yes, .450 Bushmaster ammunition can be reloaded. However, it is essential to use the correct reloading data and components to ensure safe and reliable performance. Consult reputable reloading manuals and follow all safety precautions.

10. Q: What are some common issues encountered with .450 Bushmaster rifles, and how can they be resolved?

    A: Common issues include feeding problems, which can often be resolved by using high-quality magazines specifically designed for the .450 Bushmaster. Other potential issues include failures to extract, which can be caused by a dirty chamber or a weak extractor spring. Regular cleaning and maintenance can help prevent these issues.

Conclusion

The .450 Bushmaster is a powerful and versatile cartridge that offers significant advantages for hunters and shooting enthusiasts seeking a hard-hitting, short-to-medium range option. Its AR-15 compatibility, manageable recoil, and impressive stopping power make it a popular choice for deer, hogs, and other medium-to-large game animals. When implemented in a high-quality platform like the CMMG Resolute 300, the .450 Bushmaster truly shines, delivering exceptional accuracy, reliability, and overall performance. We’ve observed that users who prioritize ethical hunting and effective terminal ballistics consistently praise the .450 Bushmaster’s performance in the field.

The future of the .450 Bushmaster looks promising, with continued innovation in ammunition and rifle design. As more states adopt straight-walled cartridge regulations, the .450 Bushmaster is poised to become even more popular among hunters. We invite you to share your experiences with the .450 Bushmaster in the comments below and explore our other guides to expand your knowledge of modern sporting rifles.

Contact our experts for a consultation on optimizing your .450 Bushmaster setup for your specific hunting needs.