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FM/BG-558 · v1.01
Spin Drift: Calculation
- Code
- FM/BG-558
- Kind
- Guide
- Version
- v1.01 2yrs ago
- Views
- 1,366
- Platforms
- As its document
- Published by
- MSG mbaker5114 4 May 2024
- Last material change
- v2.00
19 words added, 1 word removed.
v1.00
Equation
To manually estimate spin drift, we only need to know the distance of our shot and how long our bullet will be in flight.
SG is the stability factor of our projectile, considering many details of rifle and bullet construction. This information will be provided for commonly used rifle and bullet combinations in a chart below.
v1.01
Equation
To manually estimate spin drift, we only need to know the distance of our shot and how long our bullet will be in flight.
((SG x Time of Flight ^ 1.83) / Distance) x 1000 = Spin Drift in MRADs
The variable “SG” is the stability factor of our projectile, considering many details of rifle and bullet construction. This information will be provided for commonly used rifle and bullet combinations in a chart below.
Equation
To manually estimate spin drift, we only need to know the distance of our shot and how long our bullet will be in flight.
SG ((SG x Time of Flight ^ 1.83) / Distance) x 1000 = Spin Drift in MRADs
The variable “SG” is the stability factor of our projectile, considering many details of rifle and bullet construction. This information will be provided for commonly used rifle and bullet combinations in a chart below.
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