FPS example - (Box Collision)

I created class blueprint. And add Box events( Begin/End Overlap) and show/hide message - and it works fine, but when i shoting in a box, bullets collide.
How i can remove bullets collide ?
http://i.imgur.com/tYrtrQH.jpg?1
Thanks.

-Go to collision presets
-Choose custom
-Set everything like the trigger
-Change the checkbox at projectile to ignore

Thats how i would solve the problem

Thanaks.