Thank you for the answers. It was not clear for me that the text about thrown weapons in Arms Law is referring to the action cost. It makes sense now.
But about the range penalty: "You also have to add in the range penalties from the attack chart unless the axe the PC is using happens to be a throwing axe."
I currently apply the table range penalty to all throwing weapons. It could make sense to reduce the penalty in the case of a weapon made specifically to be thrown, but I currently apply an OB penalty to an attacker throwing a melee weapon because, for example, a handaxe is a very bad throwing axe (weapon quality penalty). I do not change the range penalty.
If you do not use the handaxe table range penalty for throwing weapons, what range penalty do you use for a throwing axe, for example?
Lastly, about this sentence: " It's something some of our PCs have done out of desperation. -50 for unskilled, range penalty for non-throwing axe."
The unskilled OB (no rank developed) is -25 plus stat bonuses, right? Or am I missing something?