Miller Stability Formula
Definition
A dimensionless stability factor (Sg) formulation published by Donald Miller in 2005, calibrated for modern spitzer bullets. Sg greater than or equal to 1.5 indicates adequate stability. More accurate than Greenhill for pointed high-BC projectiles.
Related terms
- Greenhill Formula
- Alfred Greenhill's 1879 empirical formula for the minimum barrel-twist rate to gyroscopically stabilise a bullet of given length and calibre. Uses a...
- Heydenreich Model
- A parameterised internal-ballistic model incorporating propellant specific force, burn-rate coefficients, and chamber volume. More physically grounded than Le Duc; the conceptual ancestor...
- IBHVG2
- Interior Ballistics of High Velocity Guns version 2; a US Army Research Laboratory code implementing the Lagrange pressure-gradient model for large-calibre and...
- LabRadar
- A Doppler radar chronograph measuring bullet velocity continuously from muzzle to several hundred metres, producing a velocity-distance profile. No physical contact with...
- Le Duc Model
- An empirical algebraic formula (1873) relating muzzle velocity to peak chamber pressure via two calibration constants. Produces velocity estimates within 3-5% of...
- Oehler Model 35P
- A dual-screen optical chronograph (plus proof channel) widely used in US forensic and manufacturer testing. Accurate to within 0.2% of reading. The...
- PRODAS
- Projectile / Rocket Design and Analysis System; a US Army Research Laboratory / Arrow Tech Associates lumped-parameter code integrating internal, external, and...
Explained in
- Internal Ballistics: Muzzle Velocity Prediction ModelsA dimensionless stability factor (Sg) formulation published by Donald Miller in 2005, calibrated for modern spitzer bullets. Sg greater than or equal to 1.5 in...