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My gut feel is that precession being what it is and, remembering my 100+ hours in a cub and 200 odd in a pawnee , precession would more likely swing the projectile left or right - not up or down ... ...

yeah I got my head around the fact that the axis of the scope's crosshair intersects the projectiles trajectory some time ago.

its just this question of "lift" due to spin.

actually, just having read my initial post, I probably communicated incorrectly ..

the question is whether or not the projectile ever passes above a line projected directly along the axis of the...

OK, just had a "discussion" with someone at work regarding the old chestnut of rounds rising before they start to fall again.

He accepted that this appeared to be the case due to the line of the...