This is not how materials work, you cannot define them on the fly like this.

fourZK · fourZK · commit 3816a792a39b · 2023-06-22T15:45:17.000+03:00
diff --git a/Data/Base.rte/Effects/Casings.ini b/Data/Base.rte/Effects/Casings.ini
@@ -20,10 +20,6 @@ AddAmmo = MOSParticle
 	Atom = Atom
 		Material = Material
 			CopyOf = Bullet Casing
-			PresetName = Weak Casing
-			Bounce = 0.8
-			Friction = 0.1
-			StructuralIntegrity = 0.5
 		TrailLength = 0
 
 
