Objects not colliding [Problem]

Unity Engine
1

So I have:
-Bullet dimensions = 1,1,1
-Box dimensions = 9,1,3

When the velocity of the bullet is low it collides.
When I put a higher velocity to the projectile it pass trought the bigger plane of the box.
When I make a bigger bullet it collides also.

What can i do to get a proper collision?

2

The problem is, that when something moves really quickly, it basically moves in increment, not smoothly, and it wont detect the collisions in those “increments”. Try raycasting, and calculating the time the bullet needs to travel before hitting the target and just give him a countdown until death.

3

RigidBodies have a continuous setting somewhere. Check that out. I can’t right now since I’m in a drive thru.

EDIT:
collisionDetectionMode

4

Try to put the force change in FixedUpdate function. and set the rigidbodie`s collision detection to continuous dynamic