How to use ballistic coefficient (SI units)?

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SUMMARY

The discussion clarifies the use of ballistic coefficients (BC) in SI units, specifically noting that BC can be expressed as 3.0 kg/m² or 3.0 m²/kg. These units are standard and not unique to Russian sources. The conversation also distinguishes between regular ballistic coefficients and G-ratings, which account for bullet shape and are utilized to model drag in trajectory calculations. To determine velocity at a specific distance downrange, one must apply these coefficients within the context of the chosen ballistic model.

PREREQUISITES
  • Understanding of ballistic coefficients and their significance in projectile motion
  • Familiarity with SI units, particularly mass and area
  • Knowledge of G-ratings and their application in drag modeling
  • Basic principles of trajectory calculations for projectiles
NEXT STEPS
  • Research how to calculate downrange velocity using ballistic coefficients
  • Explore the differences between G1 and G7 ballistic models
  • Learn about the impact of bullet shape on drag and trajectory
  • Study the application of ballistic coefficients in real-world shooting scenarios
USEFUL FOR

Aerospace engineers, ballistics experts, and anyone involved in precision shooting or projectile design will benefit from this discussion.

Gews
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Reading in Russian sources I see they use ballistic coefficients such as these:

BC = 3.0 kg/m^2

or alternatively

BC = 3.0 m^2/kg


That's quite different than the usual G1, G7, etc.

Given a certain muzzle velocity, how do I use that to calculate velocity at some point downrange?
 
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