system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does spinning a bullet make the bullet more accurate?
gpt
A spinning bullet has angular momentum.  When a thing has momentum, it resists changes to its momentum.  By spinning the bullet along its "long axis" it resists changes that might cause it spin along its "short axis" thus keeping its nose pointing forward.  On top of this, the spin causes gyroscopic precession - that is, a spinning object is resistant to changes in its orientation, again, keeping the nose forward.  Since bullets are not perfect, imperfections can cause areas of higher drag that may cause it to flip, increasing its overall drag/lowering its aerodynamics.

Ignore the downvote.  It's a fun question that's more complex than it seems on the surface.  This explanation is only a surface scraping, but gives the overall idea.