Quick Answer
To estimate distance on slopes, use the angle of elevation method and the shadow stick technique. Measure the angle of elevation using a compass, then use a rifle scope's mil-dot reticle to measure the horizontal distance to the target. Alternatively, create a shadow stick to estimate distance.
Measuring Angle of Elevation
When shooting uphill or downhill, the angle of elevation can greatly affect the estimated distance to the target. To measure this angle, use a compass to take a reading from the rifle’s point of aim to the target. For every 5 degrees of elevation, the distance can be increased by 10-15 yards, depending on the terrain and the angle. For example, if the target is 200 yards away at a 10-degree elevation, the actual distance is approximately 230-240 yards.
Shadow Stick Technique
The shadow stick technique is a simple method to estimate distance on slopes. Find a straight stick and place it in the ground perpendicular to the slope. Mark the end of the stick’s shadow, then wait for the sun to move and mark the new end of the shadow. Measure the distance between the two marks, and use a known distance to estimate the actual distance to the target. For example, if the shadow moved 10 inches in 50 yards, the actual distance to the target is approximately 250 yards.
Using Mil-Dot Reticles
Mil-dot reticles are a common feature on high-quality rifle scopes. To use them for distance estimation, measure the horizontal distance to the target using the mil-dot scale. For example, if the target is 10 mils away at a 10-degree elevation, and the scope is set to 1000 yards, the actual distance is approximately 220 yards. This method requires a good understanding of the rifle scope’s reticle and the shooter’s ability to use it accurately.
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