The Book of War wrote:1. Adjudication
1.3. The target of an attack makes combat hit determinations.
3.2. Weapons
3.2.1. Weapons which strike with sufficient force can score a hit and/or Injury to the Target Area.
3.8. Missile Weapon Conventions
3.8.4. A missile Weapon is considered to have hit if there is significant deflection of the missile head (>30 degrees). Once the missile head has significantly deflected off a target, the missile is rendered harmless.
3.8.5. As an exception to rule 1.3, an archer who attacks with an arrow may determine and call a combat hit when attacking with such a Weapon.
During my last battle practice, I received a complaint from a player about someone calling light on a rock. Rocks currently are rare on our field, and the rock in question was exceptionally light, so I chalked it up to confusion. But before I called the whole field in for an explanation of an obscure rule, I wanted to ensure I'd be giving the the correct information and so got out my BoW and scanned the applicable rules. To my surprise, I came away more confused than when I started.
I've posted the rules in question above. My instinct, originally, was to say that you cannot call light on missiles (at least not rocks and arrows, javelins are a little gray). It would seem, as currently written, that the Book of War disagrees with that instinct. It seems that even arrows are subject to the sufficient force rule as the exception for arrows only apples to rule 1.3.
So, I'm posting here to ask for clarification on sufficient force as applies to missile weapons. Can I call light on a javelin? A rock?! An arrow?!? Because I've got to say, I don't like the idea of people building 'head only missiles' so that they pass our sufficient force rules. I know where my experience makes me want to draw the lines on this... but I want to know what everyone else thinks.