Your bullet on the right is the final type, using the same caracteristics as the later DM41/51 Bullet in the 8Gramm version. Whereas the DAG manufactured the DM41/51 8Gramm with a cup to encapsulate the leadcore and MEN manufactured the DM41 only with a metaldisc, to close the leadcore to the bulletbase.
I show the 8 Gram bullets which are used in DM41/DM51 (in factory only named Bullet SX/SN) means with baseclosure (Typ SX and tinned SN)
The explanation whats Sintox Standard, whats DM41 and what is DM51
Here the answer from RUAG:
That says in short in english: Bullet is made by DAG, and MEN.
The ammo with Description SINTOX Standard has a CASE with Boxerprimer (Centralhole) and uses the same bullets as DM41/51. The difference to Ammo Typ DM41/51 is only the casetyp and a different Powder.
The DM41 load for the BMI (Ministry of Interior) has a case with Berdan (2-hole), the DM 51 for the BWB (german army) has the same case construction, but with Hinterstich in the primerhole, means at the end enlarged, so the primer fixing itself on firing into the recess and hold the primer back in its place.
Both DM41 and DM51 using the same powdertype—all 3 have the bullet with base closure disc now. MEN used always a disc as baseclosure, and DAG first used the shown construction by EMZ on the 10Gram with a cup as closure, but now uses also only a disc.
Thats why in the VPAM only the bullet from DAG was allowed, for armortests, as due to the the inserted cup at the base, the jacket in total was more strong and penetrates more. As DAG switched later also to the disc only, the DM51 from DAG or MEN can be used in tests…
The 10 Gram bullets where for the MP5, but why they had developed such a complicated bullet -2 piece design, as shown from Galgenberg and EMZ, I dont knew, but it was shortly replaced by the cup-insert in the base, and the bullet acted as a solid bullet 1piece design…
Here the normal 10Gramm Box for MP5SD:
and a box also mentioned as 8 Gramm Specialgeschoss (forrunner of the SINTOX, not with SINTOX primer, but already with baseplate to avoid contamination with lead from the hot gases on firing…