How do i Rotate Particles that come out of the Partical system?

Im am working on this gun and as you can see, the Bullets kind a look wrong. So how can i rotate them ? Just the Bullets, not the Emitter.

Thanks !

Rotate the bullet in Edit mode.
-90° on X > to point in Y+ direction / that’s the base direction of emitting particles

e.g. gun-simple.blend (165.2 KB)