I never notice any convergence issues with wing armed planes in AH.
If we really think about it, all the planes that hit out very far and have a chance in downing the target plane in AH, are wing armed planes - .50 armed USAAF planes, Hispano armed RAF planes, or N1K2(which is a different case, as it is usually a spray issue due to some 800~900 rounds of quad-20mms).
All the planes armed with nose armament - Las, 109s, Yaks - have an issue with ineffective gunnery at longer distances over 400~500yards.
The only nose armed planes that have a noticeable aiming advantage over other planes, are the P-38L and the Mossie - which, come to think of it, are planes armed with either the .50s or the Hispanos or both.