Thread: Accuracy at 100 vs 600 (example). Variations in accuracy at different ranges

Originally Posted by JaSa

In theory absolutely correct.
Practical, no projectile is 100% eccentric which means right at the start, when the centrifugal forces are high, the projectile yaws - and depending how bad it is, changes the course of flight. Later in it's flight, friction slows down spin and speed of the projectile which results in less centrifugal force so the projectile does settle down and it's impact becomes more predictable (better groups). Even later in flight, the spin is no longer high enough and the projectile starts tumbling - which again can change the course of flight. The US Artillery has a book which describes these effects on shells and projectiles and how to calculate it...

Yes the military are the ones who really know this stuff and how to predict it. So in essence, a group that is dead on at 100 might strike left or right at 600. I understand it that if someone wants a dedicated 5-600 metre load, then the load should be developed at that range