01 // Hop-Up
Hop Creates Lift
Backspin creates an upward aerodynamic force that can reduce drop and extend practical range when properly adjusted.
CQC Ballistics Systems
BB Drop Calculator
Estimate BB flight time, vertical drop, remaining velocity and impact energy based on distance, muzzle velocity, BB weight and hop-up effect.
Ballistic Configuration
FPS
g
m
cm
Higher values reduce estimated gravity drop. This is a simplified representation of hop-up lift, not a direct hop dial setting.
A higher value represents stronger velocity retention over distance.
Estimated Trajectory
50 M
Estimated Vertical Drop
16.8
centimetres below the initial bore line
Flight Time
0.57
sec
Remaining Velocity
188
FPS
Muzzle Energy
1.59
J
Impact Energy
0.46
J
Drop Without Hop
159.4
cm
Sight-Line Offset
21.8
cm
02 // BB Weight
Heavier BBs Retain Stability
Heavier BBs usually start slower at the same energy but can retain momentum and resist wind better than lighter BBs.
03 // Field Testing
Confirm With Real Shots
Test your setup outdoors at measured distances because hop rubber, barrel condition, weather and BB quality all affect actual trajectory.
This calculator provides a simplified planning estimate. Real airsoft BB trajectories are affected by Magnus lift, aerodynamic drag, wind, humidity, temperature, BB surface quality, hop pressure, barrel alignment and energy consistency. Do not use these results as a substitute for field testing.