During the age of the pike square, cavalry (in Western Europe) gave up their lances for firearms to ride around and shoot at the pike squares, and even other cavalry. How accurate would their shots be, on average, when in battle riding around (as opposed to dismounted)? Were there reports of one or groups of men who were especial accurate?
The horse archers on the Eurasian Steppes were supposedly quite accurate. They utilized techniques like timing release to when a galloping horse had all feet off the ground to decrease shaking and increase accuracy. Was this, or other techniques, used by firearm cavalry to increase accuracy as well?
As a follow up question, since cavalry often faced other cavalry on the wings of a pike a shot formation, how effective were cavalry armed with pistols and arquebuses when charging against heavy lancers?