Quick Answer
Mechanical broadheads sometimes fail to open due to incorrect arrow rest settings, low kinetic energy, or improper arrow and broadhead alignment. This can result in the broadhead not deploying its blades, reducing its cutting diameter and effectiveness.
Misaligned Broadhead or Arrow
When the broadhead is not properly aligned with the arrow’s centerline, its blades may not deploy correctly. This misalignment can be caused by incorrect broadhead installation or improper arrow selection. To avoid this issue, ensure the broadhead is centered on the arrow and properly secured. Most modern broadheads have a specific installation procedure, which should be followed carefully.
Kinetic Energy and Arrow Speed
Mechanical broadheads require a certain level of kinetic energy to deploy their blades. As a general rule, a minimum arrow speed of 220-240 feet per second (fps) is recommended for optimal broadhead performance. However, this speed can vary depending on the specific broadhead design and the type of game being hunted. For example, a larger cut diameter may require higher kinetic energy, while smaller game may require lower speeds.
Broadhead Choice and Cutting Diameter
Choosing the right broadhead for the intended game is crucial. For larger game such as elk or moose, a fixed-blade broadhead with a larger cutting diameter (at least 1.5 inches) is often preferred. Hybrid broadheads, which combine the features of mechanical and fixed-blade broadheads, can also be effective. However, for smaller game such as deer, a smaller cutting diameter (around 1 inch) may be sufficient. The specific broadhead choice should be based on the hunter’s experience, the terrain, and the type of game being hunted.
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