Demonstrating how Coriolis effects bullet drop at 1000 yards

Gunwerks
24 May 201305:14
EducationalLearning
32 Likes 10 Comments

TLDRIn this informative video, product specialist Jeremy Winters from Gun Works addresses the common issue of data inconsistency in long-range shooting due to the Coriolis effect. He explains how the Earth's rotation impacts bullet trajectory, causing different impacts when shooting east or west. Through a shooting demonstration at 1000 yards, he illustrates the significant difference in bullet impact, emphasizing the importance of considering this effect when collecting ballistic data or building a drop chart. Winters advises shooting north and south to avoid the Coriolis effect or to account for it in data collection for accurate long-range shooting.

Takeaways
  • πŸ“ˆ The video discusses common issues faced when collecting data for ballistic calculations, specifically the Coriolis effect's impact on long-range shooting.
  • 🌐 The Coriolis effect is explained as the influence of Earth's rotation on a bullet's trajectory, causing it to deviate from the intended path as the Earth rotates beneath it.
  • πŸ” When shooting west, the target appears to rotate upwards, causing bullets to hit lower, while shooting east results in the target appearing to drop and move away, causing bullets to hit higher.
  • 🎯 At a thousand yards, the Coriolis effect could require a full minute of correction depending on the direction of the shot.
  • πŸ”­ A demonstration is conducted to show the effect by shooting at targets 1000 yards to the west and east, measuring the difference in group centers.
  • πŸ“Š The results from the west show bullets hitting 8 inches lower than expected, while those from the east hit 3 to 3.5 inches higher.
  • πŸ“‰ A significant difference of over a minute, or 11 inches, between shooting east and west is observed, highlighting the importance of the Coriolis effect in ballistic calculations.
  • ⏱ The Coriolis effect's impact is substantial, with a minute of angle at a thousand yards equating to 70 feet per second at the speed of the 7 LRM bullet.
  • πŸ“ The video emphasizes the importance of considering the Coriolis effect when developing drop data to avoid significant errors in ballistic calculations.
  • ↕️ To mitigate the Coriolis effect, the recommendation is to collect data by shooting north and south, or to account for its influence when shooting in other directions.
  • πŸ“ˆ Understanding and incorporating the Coriolis effect into ballistic calculations is crucial for accurate long-range shooting.
Q & A

  • What is the main issue discussed in the video script?

    -The main issue discussed is the common problem of not being able to verify shooting data consistently, particularly due to the Coriolis effect, when collecting data for building a drop chart or a ballistic compensator.

  • Who is Jeremy Winters in the script?

    -Jeremy Winters is a product specialist at Gun Works, who is presenting information about the Coriolis effect and its impact on shooting accuracy.

  • What is the Coriolis effect in simple terms?

    -The Coriolis effect is the phenomenon where the Earth's rotation causes a bullet to deviate from its path as it travels through the air because the Earth rotates from west to east while the bullet does not.

  • How does the Coriolis effect impact shooting to the west?

    -When shooting to the west, the target appears to rotate up and towards the shooter, causing bullets to hit lower than expected.

  • What happens when shooting to the east in terms of the Coriolis effect?

    -When shooting to the east, the target appears to drop and move slightly away, causing bullets to hit higher than expected.

  • At what distance does the Coriolis effect become significant in the script?

    -The Coriolis effect becomes significant at a thousand yards, where it can cause almost a full minute of correction depending on the direction of the shot.

  • What was the purpose of the shooting demonstration in the video?

    -The purpose of the demonstration was to show the impact of the Coriolis effect by shooting in both east and west directions at a thousand yards and measuring the difference in group centers.

  • What were the results of the shooting demonstration to the west?

    -The results to the west showed that all shots dropped quite low, with an 8-inch deviation from the center of the group.

  • What were the results of the shooting demonstration to the east?

    -The results to the east showed that shots were about three to three and a half inches high, with a deviation from the center of the group.

  • What is the total difference in bullet impact between shooting west and east as demonstrated?

    -The total difference in bullet impact between shooting west and east was 11 inches, which is over a minute of angle.

  • How does the Coriolis effect impact the development of drop data for long-range shooting?

    -The Coriolis effect can lead to significant errors in drop data development, as it can cause bullets to hit higher or lower than calculated, especially when shooting at a thousand yards with a 7 LRM.

  • What is the tip given in the video to mitigate the Coriolis effect when collecting shooting data?

    -The tip is to always collect data either north and south to eliminate the Coriolis effect's up and down impact, or to know and account for its effect when developing ballistic data.

Outlines
00:00
🎯 Understanding the Coriolis Effect in Long-Range Shooting

In this paragraph, Jeremy Winters, a product specialist, addresses a common issue faced by shooters when collecting data for ballistic calculations or drop charts. He explains the Coriolis effect, which occurs when a bullet leaves the barrel and is affected by the Earth's rotation. The Earth's rotation causes the bullet's path to deviate, resulting in bullets hitting lower when shooting west and higher when shooting east. Winters emphasizes the significance of this effect, noting that at a thousand yards, it could lead to a full minute of correction. To demonstrate this, he plans a shooting demonstration, comparing the impact of shooting east and west at a thousand yards.

05:01
πŸ“ Mitigating Coriolis Effect for Accurate Ballistic Data

The second paragraph concludes the discussion on the Coriolis effect by highlighting the practical implications for shooters. Winters shares the results of the shooting demonstration, where he measured the difference in bullet impact when shooting in opposite directions at a thousand yards. The westward shots were significantly lower, while the eastward shots were higher, illustrating the effect's impact on bullet trajectory. He points out that this can lead to significant errors in drop data, especially when developing custom turrets. Winters advises shooters to either conduct their data collection along the north-south axis to eliminate the Coriolis effect or to understand and account for its impact when compiling ballistic data.

Mindmap
Keywords
πŸ’‘Coriolis Effect
The Coriolis Effect is a phenomenon that occurs due to the Earth's rotation, causing moving objects to appear to be deflected. In the context of the video, it's the primary reason for the discrepancies in bullet trajectory at long ranges, especially when shooting east or west. The script explains that the Earth's rotation from west to east causes bullets to hit higher when shooting east and lower when shooting west, which is crucial for accurate long-range shooting and data collection.
πŸ’‘Ballistic Compensator
A ballistic compensator is a device attached to firearms to reduce the perceived recoil and muzzle rise, thereby improving the shooter's ability to maintain accuracy during rapid fire. The video discusses the importance of the compensator in the context of long-range shooting, where the Coriolis Effect can significantly influence bullet trajectory, and thus the compensator's role in mitigating such effects for more accurate shooting.
πŸ’‘Drop Chart
A drop chart is a graphical representation used by shooters to predict the trajectory of a bullet over distance, accounting for factors like gravity and wind. The video emphasizes the importance of accurate data collection for creating a reliable drop chart, as the Coriolis Effect can introduce significant errors if not accounted for, especially at long ranges.
πŸ’‘Long Range Shooting
Long range shooting involves firing a projectile at targets situated at considerable distances, often over 1000 yards. The video's theme revolves around the challenges and considerations of long range shooting, such as the impact of the Coriolis Effect on bullet trajectory, which is a key factor in achieving accuracy at these distances.
πŸ’‘Zeroing
Zeroing is the process of adjusting a firearm's sights so that the point of impact aligns with the point of aim at a specific distance. The script mentions that shooters often face difficulties in re-verifying their zero after initial adjustments due to factors like the Coriolis Effect, which can cause shifts in the point of impact.
πŸ’‘Bullet Trajectory
Bullet trajectory refers to the path that a bullet follows from the moment it is fired until it hits a target or the ground. The video script uses the term to describe how the Coriolis Effect can alter the bullet's trajectory, especially noticeable when shooting in the east or west directions.
πŸ’‘Product Specialist
A product specialist is an expert in a specific product or category, providing knowledge and guidance to customers. In the video, Jeremy Winters, the product specialist, explains the technical aspects of the Coriolis Effect and its impact on shooting, demonstrating his expertise in the field.
πŸ’‘Shooting Demonstration
A shooting demonstration is a practical display of shooting skills or the effectiveness of firearms and related equipment. The video includes a demonstration to illustrate the impact of the Coriolis Effect on bullet trajectories when shooting in different directions, providing a visual and empirical understanding of the concept.
πŸ’‘Turret
In the context of firearms, a turret refers to a component on a scope that allows for windage and elevation adjustments to aim the firearm accurately at various ranges. The video mentions custom turrets, which are calibrated based on ballistic data, and how the Coriolis Effect can influence the accuracy of these adjustments.
πŸ’‘Ballistic Data
Ballistic data encompasses the measurements and calculations related to the flight of a bullet, including factors like velocity, drop, and wind drift. The script emphasizes the importance of accurate ballistic data for long-range shooting, and how the Coriolis Effect must be considered to ensure the data's reliability.
πŸ’‘North and South Shooting
Shooting in the north and south directions is suggested in the video as a way to avoid the influence of the Coriolis Effect, which is minimal in these directions due to the Earth's axis of rotation. This advice is given to ensure more consistent and accurate data collection for long-range shooting.
Highlights

Jeremy Winters introduces himself as a product specialist at Gun Works.

The video discusses common issues in collecting data for ballistic compensators and drop charts.

Coriolis effect is identified as a common issue affecting shooting data verification.

The Coriolis effect is explained in layman's terms as the Earth's rotation impacting bullet trajectory.

Bullets leaving the barrel are affected by the Earth's rotation, causing deviations in shooting.

Shooting west results in targets rotating up and towards the shooter, causing bullets to hit lower.

Shooting east results in targets dropping and moving away, causing bullets to hit higher.

At a thousand yards, the Coriolis effect can cause almost a full minute of correction.

A shooting demonstration is planned to illustrate the Coriolis effect on a rifle.

Targets are set 1000 yards east and west to measure the impact of the Coriolis effect.

The demonstration involves shooting in both directions to compare group centers.

Three hits on the steel target are confirmed when shooting west.

The demonstration continues with shooting east to compare results.

Results show significant differences in bullet impact when switching directions.

The west target shows bullets hitting 8 inches lower than expected.

The east target shows bullets hitting 3 to 3.5 inches higher than the center.

A total difference of over a minute is observed between shooting east and west.

The impact of the Coriolis effect on developing accurate drop data is emphasized.

The video concludes with a tip to collect data either north and south to eliminate the Coriolis effect or to account for it in ballistic data.

Transcripts

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Coriolis EffectLong-Range ShootingBallistic DataShooting DemonstrationGun SpecialistTarget AnalysisBullet TrajectoryEarth RotationAccuracy TipsFirearms Education