GEE vs. 100m "Fleck" - a discussion for eternity

Zeroing a hunting rifle is a crucial step to ensure precise and ethical shots. One of the central decisions in zeroing is the choice of zeroing distance and target point location. Two frequently discussed concepts are in focus: zeroing at optimal zeroing distance (GEE) and zeroing at 100 meters "spot". Both methods have specific advantages and disadvantages that depend on hunting practice, the calibers used, and personal hunting preferences.

Basics of Ballistics

The projectile of a hunting weapon follows a curved trajectory influenced by gravity and air resistance. To optimally utilize this trajectory for hunting purposes, the weapon is adjusted so that the barrel points slightly upward. This way, the projectile typically intersects the sight line twice: once at the first sight line crosshair (ascending branch of the trajectory) and once at the second sight line crosshair (descending branch of the trajectory).

• Optimal Zeroing Distance (GEE): The GEE is the maximum distance at which the projectile deviates from the sight line by no more than a certain value, usually ±4 cm (half of the target zone of the game).
• Sighting in at 100 meters "Spot": Here, the weapon is adjusted so that the projectile hits exactly on the aimed point ("spot") at 100 meters. The point of impact thus corresponds exactly to the center of the scope at 100 meters.

Sighting in on GEE

Definition:

When sighting in on GEE, the point of impact is chosen so that the trajectory of the projectile remains within a specified target corridor in a certain range (e.g., 50 to 180 meters). For many hunting calibers, this corridor is about ±4 cm, which corresponds to half the hit zone of game (e.g., roe deer or red deer).

Advantages:

1. Maximum range without correction: Hunters can shoot at different distances without making adjustments to the sights.
2. Ideal for open areas: Especially at medium to long shooting distances, such as in field hunting grounds, GEE allows for high flexibility, as the point of aim usually remains unchanged at distances of 50 to 180 meters.
3. Simple point of aim: With correctly determined GEE, the point of aim remains constant within hunting practice.

Disadvantages:

1. Limited precision at short distances: At very short distances (e.g., under 30 meters), the projectile often falls below the sight line. This can be problematic in driven hunts or very close game scenarios.
2. Complicated ballistic calculation: The exact GEE depends heavily on the caliber used, the type of projectile, and the ammunition. It requires ballistic knowledge and possibly verification with a ballistic app or table.

Sighting in at 100 Meters "Spot"

Definition:

When sighting in at "100 meters spot," the point of impact is precisely adjusted to the target point at this distance. At other distances, the point of impact is above (up to about 100 meters) or below (from about 120 meters) the line of sight.

Advantages:

1. Intuitive target point: Especially for hunters who do not wish to perform ballistic calculations, the "spot" shot at 100 meters provides a simple and easily understandable basis.
2. Ideal for short to medium distances: For hunting scenarios where the shooting distance usually remains under 150 meters, sighting in at 100 meters is precise and effective.
3. Precision in stand hunting: At typical stand distances between 80 and 120 meters, the hold point is usually nearly perfect.

Disadvantages:

1. Limited range without correction: From distances of about 150 meters, the shooter must expect a falling bullet trajectory and make hold point corrections.
2. Unsuitable for long distances: In large areas with shooting distances over 200 meters, a rifle sighted in at 100 meters quickly becomes imprecise, as the bullet drop increases significantly here.

Comparison of Methods

Practical Recommendations

1. Zeroing for calibers and types of hunting:
   • .308 Win: Zeroing at about 170-180 meters (impact point at 100 m about 4 cm high).
   • .30-06: Similar values as .308 Win.
   • .223 Rem: Zeroing often somewhat shorter, about 140-150 meters.
2. Sighting in depending on the type of hunting:
   • Sitting hunter: Sighting in at 100 meters "spot" is intuitive and sufficient for distances up to about 150 meters.
   • Driven hunt: Distances of under 50 meters are often encountered, here sighting in on the spot (possibly at 50 meters) is sensible.
   • Wide territories: For wide field or mountain hunting areas, sighting in at zeroing is recommended to maximize the target corridor.
3. Use ballistic apps: Modern ballistic apps help to calculate the trajectory and zeroing precisely. They take into account caliber, bullet type, muzzle velocity, and environmental factors.

Conclusion

The choice between the cheapest zeroing distance (GEE) and zeroing at 100 meters "spot" depends on individual requirements, the type of hunting, and the caliber. While GEE is particularly advantageous in large areas and for versatile hunting scenarios, zeroing at the spot is ideal for short to medium distances and ease of handling. Through a thorough ballistic analysis and practical tests, hunters can find the optimal setting for their needs.

FYI

Our partner Roedale has produced an extremely exciting and insightful video on this topic: