Changing missile speed, accuracy, etc for thrown weapons.

[Wyvernboy]

Hi I know that changing missile speed, accuracy, etc for bows and crossbows can be done in weapons.xml, but how and where do I find the attributes to change for Javelins? Javelins only have the crafted components listed in weapons.xml, so I went to crafting_pieces.xml to find the attributes mentioned above but they are not there either.
I'm just your average com user with little coding experience.