Read the history of the gun in the MiG-29, Su-27, and Su-33 (same gun and aiming system). It is laser accurate and, as its a single barrel gun, fires at a precise area. The M-61 in American jets is meant to align the firing barrel with the aim point so that it represents a single barrel but very high firing rate weapon, however, in practice it produces a spread after certain range and this can actually help in destroying an airborne target or blanketing an area on the ground. Sorry for the drawn out answer but yes the Russian jets have very accurate gun systems- mostly due to the laser range finder used for aiming(better than radar aiming)
