What do you think of the twist rate stability calculators? Do they have a flaw that at some point the data they generate dose not match what happens in the real world?
I have been using the Berger and the JBM calculators and thought "I need to check on the stability at the velocity down range, like at 1000 yards and see if the bullet is still in the stable zone"
So I used data for the Sierra 130 game changer at different velocities at my altitude of 4500. Turns out that a 1 in 8 twist barrel will stabilize the GC at around a muzzle velocity of 1500 fps using the Berger calculator, the JBM was green down to 600 fps for muzzle velocity.
Anyone have a better method or calculator for determining bullet stability for the entire trajectory?
I have been using the Berger and the JBM calculators and thought "I need to check on the stability at the velocity down range, like at 1000 yards and see if the bullet is still in the stable zone"
So I used data for the Sierra 130 game changer at different velocities at my altitude of 4500. Turns out that a 1 in 8 twist barrel will stabilize the GC at around a muzzle velocity of 1500 fps using the Berger calculator, the JBM was green down to 600 fps for muzzle velocity.
Anyone have a better method or calculator for determining bullet stability for the entire trajectory?