Can do...
1) Visible dents and dings - if the nose is beat up, so is the rest of the bullet.
Indication of rough handling on the assembly line before the bullets are assembled.
Beat up nose means beat up heel. If the heel is damaged,
it won't produce predictable trajectories.
2) Variations in drive band shape/cannelure depth.
If bullets are shaped differently, they fly differently
3) Bullet material compressed down past the crimp onto the brass.
Interferes with case mouth expansion when fired.
Uneven skirt also changes the shape of the bullet heel.
Causes uneven pressure release as it exits the muzzle,
changes bullet exit angle depending on where the release occurs.
4) Visibly asymmetric shoulder - nose to drive band transition is irregular.
Shifts the center of gravity off center causing bullet wobble on exit.
5) Visibly tilted bullet, compare the two.
If the bullet doesn't align with the center line of the bore
it will engage the leade at an angle and swages the bullet unevenly.
Creates an asymmetric bullet, produces wobble on exit.