How to ignore collision between same type object

[Rumburak29 (Rumburak)]

I have blueprint “projectile” (with static mesh).

Problem is, that here is a collision between bullets. For example for shotgun weapon I need to create this projectile 10times and projectile have collision on start.

[Titirez]

Every static mesh actor or component has a collision section.
From the dropdown, set it to custom.

Then you can specify desired behavior with all other types of objects