How does Horse Archery affect skill limits based on Riding?
Horse Archery applies to riding penalties derived from shooting from horseback, most notably the -2 incurred from a dodging or attacking mount, and the penalties for a failed control roll (see B548). It is not intended to apply to trick shooting, though GURPS Fantasy has techniques which cover this. Horse Archery effectively caps riding control penalties in the following way: • Select the greater of [Bow skill minus penalties] and [Horse Archery], capped by your unmodified Bow skill, to find your effective shooting skill. • Select the lower of your shooting skill and Riding to determine your effective Bow skill for this round. • Apply speed/range and other environmental modifiers to your effective Bow skill to determine your final effective Bow skill.