Would it make sense to load the 2 outer pair of guns with AP and the 2 inner pairs with DW? If the AP is more useful for wings and DW is more useful for fuselage hits (fuel tanks and such), I reckon I have a better chance like this. Or should it be the other way around? does it make sense or is it better to have DW-AP-DW-AP-AP-DW-AP-DW ?

I use the 1942 setup of half DW\Inc and half AP. DW's on the outside 4 guns and AP on the inside 4 guns. Like Kris, I use tracers (1 in 5 I think) in the last 50 rounds to let me know when the guns are running low.

Actually, tell a lie. In the outer 2 guns (1&8), I use the white incendiary tracer.

I've read that German bombers had 2/3 AP and 1/3 incendiary in their MGs.

In game I noticed that incendiary are very good against British bombers with fabric-coated wings.

I am getting decent results with this load (each wing from outside to in, both Spit and Hurri):-

AP, AP, White Tracer/incendiary (50 red reserve), DeWilde

AP to do damage and make tanks leak or kill pilot
Tracer/Incendiary to observe aim and ignite leaking fuel
DW to confirm hits (they cause a 'splash' on hits) with additional incendiary properties.

Has anyone caught a 109 on fire yet? I have started a fire on a condor's elevator but never a fighter.

I thought ball ammo tended to flaten out when it hit, compared to AP that went straight through, so hitting a wing with ball could do more damage (if modelled)

Trying ball, ball, AP, AP, thinking that I hit the wings with the ball and main body with the AP.

I'm still tweaking :)

I've managed to set a 110's ailerons on fire, looked very cool.

I've set 109's on fire but they soon go out and carry on flying!

Self-sealing tanks?

Normally, when they come out of the explosion, they constantly lose a lots of fuel and are dry after some minutes.

Apart from that, I also had a 109 explosiong incident this night and the two guns equipped with DeWilde appeared to do the job well when you hit it from above or below at the point of convergence. However from 6 o clock I rarely can ignite or explode a 109.

AP / De Wilde on every gun except on the inner 2 - AP / Tracer.

Works more or less OK for me.

Mine is similar to Kristorf's. I alternate guns rather than belting though, I.E. #1 AP, #2 DeWilde, etc. I put white tracer every fourth on the outside only with the last eighty red. I feel this gives the best destructive balance.