Even air gunners talk about spiraling.
www.pyramydair.com/blog/2009/07/do-pellets-spiral.html
One post:
"To Matt:
I could agree that bore does not impart precession only if it is a perfect bore. If at any point, it alters the surface or shape of the projectile, (non-uniformly), then it will contribute to vector forces altering the trajectory.
I do agree that precession can be consistent. The guys "down the hall" from me can calculate precession and estimate POI fairly well.
If the irregularity causing the spiraling is consistent, then the spiraling will be consistent, and a rifle could deliver 2-inch groups, even with an 8-inch spiral.
I swear my Infinity does this - the spiral I see appears much larger than the groups I can get, (a non-scientific observation, of course). It does mean, however, that sighting in at various distances means much more than compensating for drop - you also have to adjust for where in the spiral you are for each distance.
Shooting in a cross-wind is a whole different animal. In addition to the "side force" of the wind moving the pellet, even a perfectly stable projectile, if spinning, will succumb to magnus effect in a cross-wind. This can cause the bullet to rise, (ie, drop slower), sink, or veer abritrarily off course. Wind is not consistent, golfers hate it.
If someone could remind me which pellet was recomended for me to try instead of the EunJins, it would be much appreciated...
Best regards,
Jane Hansen"