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Purpose
This tool generates five grids showing wind drift, drop, final velocity, final energy, and MV sensitivity for different combinations of ballistic coefficients and muzzle velocities at a fixed range. Use it to understand how BC and MV affect trajectory performance and to identify optimal load combinations.
Inputs
Range: Distance to the target in yards.
Drag Model: G7 generally better suited for modern boat-tail bullets. G1 for older flat-base bullets.
Drop/Drift Units: Choose between MRAD, MOA, or inches for displaying drop and drift values.
Energy Units: Choose between ft-lbs or Joules for the energy table.
Temperature: Air temperature in degrees Fahrenheit. Higher temperature = less air density = less drag.
Altitude: Elevation above sea level in feet. Higher altitude = less air density = less drag.
Humidity: Relative humidity percentage. Higher humidity slightly reduces air density.
BC Range: Define the start, end, and increment for ballistic coefficients.
MV Range: Define the start, end, and increment for muzzle velocities in fps.
Results
Wind Drift (10 mph): Shows drift at the specified range with a 10 mph full-value crosswind from 3 o'clock. Lower values (green) are better.
Drop: Shows bullet drop below the muzzle line. Lower values (green) mean less drop.
MV Sensitivity: Shows the drop difference between MV ±0.5% (1% total spread). Lower values (green) mean the load is less sensitive to velocity variations, making it more forgiving of inconsistent ammunition.
Final Velocity: Remaining velocity at target range in fps. Higher values (green) are better.
Final Energy: Remaining kinetic energy at target range in ft-lbs. Higher values (green) are better.
Each row represents a different BC, and each column represents a different MV. Color coding helps identify the best (green) and worst (red) combinations.
Simulation Details
Wind: Fixed 10 mph full-value crosswind from 3 o'clock (used for drift table only).
Launch: Horizontal fire from muzzle (no zero, no scope height).
Spin Effects: Disabled for simplified comparison.
Note: This tool is for comparative analysis. Not useful for live fire trajectory predictions.