Recently I've pushed my wing gun convergence back out to 350-450. Cannon and MG. With game release 2.20 I pulled those in to 250-325 as a response to suddenly not being able to hit anything after updating to that release online. With 2.30 I suddenly couldn't hit anything with those short convergences. Almost every sortie until 2.30 patch 3, not landing any kills, or only 1, or assists. With patch 3, I decided to pull my convergences out and started landing kills again. It was like night and day. I landed from one sortie with my guns at the shorter convergences with only assists and frustration. Pulled my convergences out for the next sortie, and everything I shot at was hit as my sight picture used to work with the shorter convergences.
In both cases I was aiming with the same sight picture and lead values due to the gunsights I use.
Tracers on or, tracers off. It's the sight picture you have to train yourself to which never changes. When you adjust convergence you are attempting to fit the bullet stream to your sight picture. We are all limited to shooting to where the con will be visa your relative flight paths and how that relates to what you are using in your windscreen, gunsight glass edges, or reticle ring as your percentage of lead relative to lines of travel. The closer you can maneuver to your target the less you need to worry about your sight picture.