mean point of impact

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mean point of impact

The point whose coordinates are the arithmetic means of the coordinates of the separate points of impact/burst of a finite number of projectiles fired or released at the same aiming point under a given set of conditions.
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Adjusting with a 6 o'clock hold using the 124-grain load pulled the cluster tighter toward the black bull, with average point of impact less than 2 inches high.
Although all three heads produced nearly identical results while paper tuning and measuring arrow speed, the arrow's average point of impact at 40 yards varied by more than six inches left/right among the dual-caliper (Shark), single-caliper (Little Goose) and hookstyle (Silverhorn) release heads.

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