243 vs 6.5 Creedmoor: Mild Steel Performance Comparison

Table of Contents

1. Introduction
2. Velocity Comparison
3. Penetration Testing
4. Performance of Solid Copper Bullets
5. Efficiency of the .243 Winchester
6. Efficiency of the 6.5 Creedmoor
7. Impact of Kinetic Energy on Penetration
8. Sectional Density of Bullets
9. Conclusion
10. Recommendations

Article

Introduction

Have You ever wondered about the differences between a .243 Winchester and a 6.5 Creedmoor on mild steel? In this article, we will explore the performance of these two cartridges and compare their velocities, penetration capabilities, and overall efficiency. By analyzing the results of penetration tests and considering factors such as bullet composition, barrel length, and sectional density, we will uncover the strengths and weaknesses of each cartridge. So, let's dive in and discover what makes the .243 Winchester and the 6.5 Creedmoor unique.

Velocity Comparison

To understand how these cartridges perform on mild steel, it is crucial to examine their velocities. Using a standard 20-inch barrel, we obtained the following average velocities:

• .243 Winchester:

  • 140 grain soft point: 2642 feet per Second
  • 80 grain solid copper bullet: 3022 feet per second

• 6.5 Creedmoor:

  • 140 grain soft point: 2708 feet per second
  • 120 grain solid copper bullet: 2820 feet per second

Although the .243 Winchester had a higher velocity with the 80 grain solid copper bullet, it fell short compared to the 6.5 Creedmoor in terms of overall performance. The 6.5 Creedmoor showed consistency and delivered a slight edge in velocity, especially with the 140 grain bullet.

Penetration Testing

To determine the penetration capabilities of these cartridges, we conducted tests on different thicknesses of mild steel plates. Starting with a quarter-inch plate, both the .243 Winchester and the 6.5 Creedmoor successfully penetrated the steel, with the .243 Winchester leaving a smaller hole. However, when tested against a 3/8-inch plate, the 6.5 Creedmoor proved more effective, while the .243 Winchester fell short.

Moving on to a half-inch plate, neither cartridge was able to penetrate completely. The 6.5 Creedmoor showcased impressive performance by penetrating 382 thousandths into the steel, whereas the .243 Winchester only reached a depth of 330 thousandths.

Performance of Solid Copper Bullets

One interesting observation from the penetration tests was the underperformance of solid copper bullets on mild steel. Despite their lighter weight and potential for higher velocities, solid copper bullets consistently failed to penetrate beyond 3/8-inch of mild steel. This could be attributed to factors such as bullet design and material composition. Solid copper bullets may not have the structural integrity to withstand the resistance of steel as effectively as lead-Core bullets.

Efficiency of the .243 Winchester

Although the .243 Winchester fell short in terms of penetration compared to the 6.5 Creedmoor, it is worth noting its efficiency given its velocity limitations from a 20-inch barrel. The .243 Winchester achieved velocities slightly lower than the manufacturer's specifications, indicating room for optimization with longer barrel lengths. Despite this, it produced respectable kinetic energy, showcasing its potential in applications where deep penetration is not a primary requirement.

Efficiency of the 6.5 Creedmoor

The 6.5 Creedmoor, known for its inherent efficiency and ballistic performance, displayed consistent results throughout the tests. Despite its slightly lower velocity than advertised, it exhibited higher kinetic energy and superior penetration capabilities compared to the .243 Winchester. This performance can be attributed to factors such as its sectional density and bullet composition.

Impact of Kinetic Energy on Penetration

Although the .243 Winchester had a higher velocity, the 6.5 Creedmoor's overall kinetic energy output was significantly greater. This translated into deeper penetration, emphasizing the importance of kinetic energy when it comes to the ability to penetrate materials effectively. However, it is important to note that the difference in kinetic energy between the two cartridges may not be significant enough to make a substantial impact in real-world scenarios.

Sectional Density of Bullets

When comparing the sectional density of the bullets used in the .243 Winchester and the 6.5 Creedmoor, a notable difference becomes apparent. The .243 Winchester's 100 grain soft point had a sectional density of 0.242, which was considerably lower than the 6.5 Creedmoor's 140 grain soft point, with a sectional density of 0.287. This disparity in sectional density contributes to the 6.5 Creedmoor's enhanced penetration capabilities, as sectional density plays a significant role in a bullet's ability to penetrate effectively.

Conclusion

In conclusion, the .243 Winchester and the 6.5 Creedmoor exhibit distinct characteristics when it comes to their performance on mild steel. The 6.5 Creedmoor consistently outperformed the .243 Winchester in terms of penetration, attributable to factors such as sectional density, bullet composition, and overall kinetic energy output. Although the .243 Winchester showcased limitations in terms of penetration, its efficiency from a 20-inch barrel and potential for optimization with longer barrels make it a viable choice for certain applications. Ultimately, the choice between these cartridges depends on individual preferences and specific shooting requirements.

Recommendations

• For applications requiring deep penetration on mild steel, the 6.5 Creedmoor is the superior choice due to its consistent performance and higher kinetic energy output.
• If efficiency and versatility are key considerations, the .243 Winchester offers a viable option, particularly when optimized with longer barrel lengths.
• When using solid copper bullets, it is essential to be aware of their limited penetration capabilities on mild steel and consider alternative bullet types for applications requiring deeper penetration.

Highlights

• A comparison between the .243 Winchester and the 6.5 Creedmoor on mild steel
• Velocity and penetration testing results reveal differences in performance
• Solid copper bullets Show limitations in penetrating mild steel
• The .243 Winchester exhibits efficiency despite velocity limitations
• The 6.5 Creedmoor showcases superior penetration capabilities and kinetic energy
• Sectional density plays a crucial role in bullet penetration
• Recommendations for specific shooting requirements and bullet selection

FAQ

Q: Which cartridge performed better in terms of penetration? A: The 6.5 Creedmoor demonstrated better penetration capabilities on mild steel compared to the .243 Winchester.

Q: Why did the .243 Winchester have higher velocities but lower penetration? A: Despite its higher velocities, the .243 Winchester's bullet composition, sectional density, and kinetic energy output were not optimized for deep penetration.

Q: Are solid copper bullets recommended for penetrating mild steel? A: Solid copper bullets generally underperform when it comes to penetrating mild steel due to factors such as their lighter weight and potential structural integrity issues.

Q: Does barrel length affect the performance of these cartridges? A: Yes, barrel length can impact velocity and, consequently, penetration capabilities. Longer barrels may optimize the performance of both the .243 Winchester and the 6.5 Creedmoor.

Q: Which cartridge is more efficient overall? A: The 6.5 Creedmoor exhibits greater efficiency, mainly attributed to its higher sectional density, superior bullet composition, and higher kinetic energy output.