Projectiles with bulletType=item don't accept MM items.
Latest dev build (3397) MythicMobs 4.10.0 - 1.16.1.
bulletType=ITEM;material=IRON_SWORD functions and throws an iron sword, bulletType=ITEM;material=BANDIT_DAGGER throws an error and throws the default STONE item.
Item:
BANDIT_DAGGER:
Id: IRON_SWORD
Model: 1Skill:
- projectile{oH=BanditDaggerThrow_Hit;oT=BanditDaggerThrow_Tick;bulletType=ITEM;material=BANDIT_DAGGER;velocity=15;d=40;i=2}