> Does anyone have any experience lighting wood shavings without dried grass (etc).
Not worth the effort. It's possible but really hard. The wood has to be REALLY dry, the shavings really thin. Actually, just shavings weren't enough.. I needed to partially split the shavings to get extra surface area / edges. It's much easier to get the sparks to catch on something a bit more flammable.
I found that it well worth carrying 1 gram worth of firestarter. A cotton ball, drier lint, some commercial firestarter, etc.