Hey waff,
Keep it, it's OK!
The Flak 41 did not fire the 8,8 cm PzGr (nor, I believe, the 8,8 cm PzGr39/43).
I'll try clarify on some of the Gerry nomenclature however:
The 8,8 cm PzGr was the first 8,8 cm AP projectile provided with the 8,8 cm Flak 18/36/37. The cavity containing the explosive charge (filler) was "large" (that is larger than in the other 8,8 cm AP projo's). The fuze it used was the BdZ fr 8,8 cm PzGr
Next, there is the 8,8 cm PzGr 39, this AP shell has a smaller filler cavity and it uses the BdZ 5127 fuze.
The 8,8 cm PzGr 39/1 is an improved version of shell above, I'm not sure however what the actual improvement involved. Most experts tend to believe this has to do with quality of the steel used for the projo body. Fuze: BdZ 5127
Last but not least we have the 8,8 cm PzGr 39/43. Basically the same shell as a standard 8,8 cm PzGr 39 (this however may have to be corrected into 39/1 as I'm not certain wether or not the hightend quality was standardized for the 39/43) , but the drivingbands are of a new, wider, design to allow it to be fired from worn (more than 500 rounds fired) Kw.K 43 and PaK 43 guns. Fuze: BdZ 5127.
NOTE: the 8,8 PzGr 39, 39/1 and 39/43 are considered to be among THE most dangerous shells when found as misfire/dud (the BdZ 5127 uses a striker pin that functions by means of a spring under tension that is released on impact!!!). These misfires/duds are NOT to be touched under ANY circumstance and are to be destroyed on site.
greetz,
Menno.