What's "unturned" ammunition? Do you mean "untuned" ammunition?
99.999% of all bullets fired leave when the muzzle axis is swinging in the vertical axis, for the most part. A tiny bit of its swing axis is in other directions due to the different harmonics of its resonant frequency wiggling it. Case heads out of square smacking the bolt face off center when fired causes horizontal shot stringing because it imparts a force off center to the recoil axis and locking lugs in battery at the top and bottom allow this off center bolt face hammering to effect horizontal shot distribution. Creighton Audette proved this in his tests decades ago and they've been published, somewhere.
Read post 38 for what happens in the vertical axis.