Fairly spread among Axis nations was the practice of producing and using exploding ammo for their heavy machine guns. Did it really improved the firepower of a fighter or bomber (vs. the usual ammo used), to justify the investments? Granted, in most cases the 20 mm stuff will not fit where an...
It's early 1944 and you are one of the Luftwaffe's remaining experten
Your squadron is tasked solely with defence of the Reich missions against US daylight raids
You are able to pick the Rustsatze you feel is best
Which will it be ? - and don't forget to justify your choice ;)