Quick Answer
For uphill shots, increase arrow weight by 1-5 grains to compensate for the increased distance and trajectory, but avoid over-weighing to maintain accuracy and penetration.
Understanding Arrow Weight and Trajectory
When shooting uphill, the arrow’s trajectory is affected by the increased distance and angle of elevation. A lighter arrow may not have enough kinetic energy to compensate for the longer distance, resulting in a poor hit or miss. Conversely, an arrow that’s too heavy can penetrate too deep, potentially harming the animal or causing unnecessary tissue damage.
Calculating the Optimal Arrow Weight
To determine the optimal arrow weight for uphill shots, calculate the increased distance using a ballistics calculator or a hunting app. For example, if the uphill shot is 20 yards longer than the flat shot, and the arrow is traveling at a velocity of 280 fps, the increased distance can be compensated for by adding 2-3 grains of weight. This adjustment will help maintain a consistent trajectory and prevent over-penetration.
Practical Guidelines for Arrow Weight
In general, it’s recommended to increase arrow weight by 1-5 grains for every 20-30 yards of uphill elevation. This adjustment should be made in conjunction with a reduced draw weight to maintain a consistent kinetic energy. For example, if the standard arrow weight is 400 grains, a 3-grain increase would result in a 403-grain arrow, which is suitable for a 20-30 yard uphill shot. Always consult the manufacturer’s recommendations for arrow weight and kinetic energy to ensure optimal performance.
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