- Yes
- No
I would like to suggest the 2 cm Minengeschoss X (or short MX) tracerless variant for 2 cm Mg 151/20,.
It was a latewar further development on the 2 cm Minengeschoss, to further increase capacity, the bottom was extended, increasing the capacity from 18g HA 41 to 25g HA 41. With a weight of “just” 104g it came with a variety of loadings and velocitys duo to increased wear.
It was used and intended in the 20x82mm, 20x135mm Mauser and 20x138mmB Rheinmetall ammo for the 2 cm Mg 151/20, 2 cm Mg 213C and 2 cm Flaks. While overall it didnt go into frontline service a certain amount was build for tests.
possibly 100.000 were produced and send to Italy. (Click to show)
Similar extended length Minengeschoss X was also tried for 30mm guns with 420g, however it also did not see frontline service.
Further it was also intended with a velocity of 1000m/s in the Mg 213C and was overall intended to replace the normal Minengeschoss.
Some barrle detonations were encountered in the 2 cm Flaks, as well as some instability duo to length and ballancing, which could also be conected to experimental barrles with different progressive twist in rifleing. However it could also be unrelated, overall it was experimented with different progressive twist barrles for all guns, including the MG 151 and Flak, as it was found that it will drastically reduce wear and stress near the chamber on the barrle rifeling. This is even represented on the MX page in Handbuch der Flugzeugbordwaffenmunition 1936-1945, that has the note “Laufdrall von 4° auf 9° steigend” (Barrle twist increasing from 4° to 9°).
The extended bottom would have also made more effective 2 componment HE and Incendary rounds with greater effect from both, unlike the normal Brandsprenggranate of the Mk 108, where for greatly increased Incendary effect the HE filler was decreased to around 40g.
In game it would offer an extreme improvement over the Brsprgr. L’Spur (HEFI-T) as well as a good improvement over the current normal Minengeschoss available, exchanging Velocity (705m/s) for far greater filler (25g HA 41 → 40g TnTa).
This round would be very effective against airtargets every size from biplane to bomber as well as potentially strong against unarmored targets as well as potentially armored targets with hits in close proximity to crew via pressure damage.
Production examples found are by DWM and the drawing Nr. D20LF1B4S1 beeing dated 17.11.1943.
Stats and pictures:
Source:
Handbuch der Flugzeugbordwaffenmunition 1936-1945
Visit to Mauser Werke AG 2/24
The Crowood Press History of Automatic Cannons