Minecraft wiki entry for Explosion, associated text: Destroyed blocks have a 1⁄p chance of dropping as collectible resources, where p is the explosion power. So, blocks destroyed by an (uncharged) creeper's explosion have a 1⁄3 chance of dropping. However, dragon eggs, beacons, conduits, heads and shulker boxes always drop from explosions, though the items may be destroyed by subsequent explosions. In addition, explosions from TNT and minecarts with TNT cause a 100% drop rate.‌[Java Edition only]