Spin Drift

Al O - Spin Drift occurs, to some extent, during the entire flight of the round. The problem occurs at a greater degree when the round goes trans sonic because the bullet is then over stabilized. This cuses the bullet to fall nose high and presenting a greater surface to the air resistance. You then have the same effect of a pencil rolling on a table. While the sonic shock wave protects the bullet from excessive spin drift early in flight, It is present. If you want a real demonstration of spin drift, check out the next black powder match. My .50 drifts 7 inches at 100 meters. Now that's fun with non-adjustable sights!