I swear I saw a post on this before, but I can't seem to find it.
I've got bullets that move fast, and often they skip the collider and go right through walls. I've added a RayCast to them, as often suggested in the Unity forums, but that also misses it sometimes, so if you shoot at the right angle, you can still skip the walls. I've even gone so far to add a 2nd ray cast to judge the distance between the projectile and a "wall" object, and destroy it if it gets too close, but often the ray doesn't even see the object, even though it's part of a tile set without any spaces.
Any one know how to fix this?