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Compound Bow Arrow Speed Formula:
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The compound bow arrow speed formula estimates the actual arrow speed based on the IBO (International Bowhunting Organization) rating and arrow weight adjustment. It provides a practical way to predict arrow velocity for hunting and target shooting applications.
The calculator uses the arrow speed formula:
Where:
Explanation: The formula accounts for the reduction in arrow speed that occurs when using arrows heavier than the standard 350 grain weight used for IBO testing.
Details: Accurate arrow speed estimation is crucial for determining arrow trajectory, kinetic energy, and effective hunting range. It helps archers make informed decisions about equipment setup and shooting technique.
Tips: Enter the IBO rated speed of your compound bow in fps and the arrow weight adjustment in grains over 350. Both values must be valid positive numbers.
Q1: What is IBO speed rating?
A: IBO speed is measured with a bow set at 70 lbs draw weight, 30" draw length, and shooting a 350 grain arrow under standardized conditions.
Q2: How accurate is this formula?
A: The formula provides a good estimate for most modern compound bows, but actual speed may vary based on specific bow characteristics and setup.
Q3: What are typical arrow speeds for compound bows?
A: Most modern compound bows produce arrow speeds between 280-350 fps, depending on draw weight, draw length, and arrow weight.
Q4: Why does arrow weight affect speed?
A: Heavier arrows absorb more energy from the bow, resulting in lower velocity but often better penetration and quieter shooting.
Q5: Should I prioritize speed or weight for hunting?
A: Balance is key. While speed affects trajectory, heavier arrows provide better penetration. Most hunters choose arrows between 400-500 grains for optimal performance.