What makes revolvers so accurate as opposed to semi-automatic pistols?

Answer 1

A revolver is typically more accurate than a semi-auto because the revolver has only one moving part when fired from the cocked position -- the hammer hits the round which discharges explosive force in a single direction to propel the projectile down the barrel. The single force vector is much easier to correct than the multiple force vectors exerted by a semi-auto. In a semi-auto, the hammer hits the round discharging explosive gases in several directions, a) Forward, to propel the projectile; b) Rearward, to throw the charging slide back hard enough to cock the hammer and chamber another round, and c) Sideways, expelled from the breach as it opens to eject the used casing. All this explosive force and mechanical movement serves to throw the aim off in a semi-auto.