Sierra’s statement* — “We have never been successful in accurately predicting BC values, or determining these values by any method other than firing tests” — underscores the importance of measuring actual, downrange velocities rather than relying on predictions or short-range extrapolations.

  • Traditional chronographs (optical or magnetic) only measure velocity at the muzzle or a few feet away.

  • Labradar LX uses Doppler radar to track the bullet through multiple distances downrange,

  • This allows shooters to directly calculate BC and other drag-related metrics from real velocity decay in their rifle.

*Excerpt from Sierra Bullets 2.4 Lessons Learned From Ballistic Coefficient Testing "We have never been successful in accurately predicting BC values, or determining these values by any method other than firing tests"

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