Bullet make a curve

Hello, I have a problem with my Projectil. It makes a kind of arc, but still hits the target. I would like to get rid of this arc. Also, it often happens that the projectile "spins" in the air, it wobbles around. I also made a video. Unfortunately, the moving around didn't happen: https://youtu.be/tSYbkz91cwQ
I think the problem is the power of the ranged item. But I still want the projectile to fly fast.

The shaking: https://youtu.be/onzELqTGAX4