- Yes
- No
Tis is a transfer from the old forum
The French gov had an APDS program for the AMX 30 named : the 105/60/43 APDS, however no precisions were given on the round.
At the same time, The AMX/APX test division was ordered to test British L28A1 APDS
And by 1961 the AMX bureau had made pre-production modifications to the 105 gun to ensure compatibility with British APDS and HESH rounds.
Now if we do a comparison with between the program name and L28A1’s dimensions (picture above) we can find they are the same value rounded up (104,8 = 105 ; 61,2 = 60; 44,4 = 43), we can conclude the 105/60/43 APDS round is just the french test designation for L28A1.
The only difference would be that the round is fired at 1450 m/s instead of the usual 1470m/s to ensure compatibility with French twist.
This would reduce penetration from 350mm (at 1478 m/s) to around 340mm (at 1450 m/s) (estimated with Gaijin penetration calculator)
Given how the 20F2/M693’s APDS is named OPTSOC, I could guess this could have been named OPTSOC F1 had it been adopted.
Sources :
1961 AMX document about modifications made to preseries /prototypes of the AMX 30 before production. From Chatellerault (french army) Archives
This included APDS compatibility
1960 EAB (Bourges plant) letter to the AMX test department director. From Chatellerault (french army) Archives.
This is about the D1510 gun (complying to D1507-T standards) capable of firing T57 (future OCC 105 F1) and British L28A1 APDS.
DGA Armament history division, part of the French Ministry of Defense. Picture from Chatellerault (french army) Archives. Story about the french APDS programe with the AMX 13’s 75/54/40 APDS but also talks about the AMX 30
Spoiler
L28A1 dimensions from
https://vpk.name/images/i479626.html