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An archer can keep different kinds of arrows or bolts in a quiver with the Orderly quality but access and reload without taking more time. An archer could keep mystical, poisoned, and other projectiles in the same Orderly quiver and always draw the correct one without taking more than a Movement/Free Action.
Without a specialised quiver, reloading takes a Combat/Movement action to draw a specific bolt/arrow from a mixed quiver – or a projectile can be pulled out at random. If drawn at random, you can see the value of using different coloured dice to represent projectiles. Stick them all in a bag and draw one out without looking.