My guess with the Scimitar would be that the "76" might be nr. of rounds ready in the turret, while the higher number (whatever it is) is total stowage?
Anyway, here's my addition:
(sorry, the source is in Czech)
BVP-2 (Czech BMP-2): 2A42.
Ammo used: HE-Frag-T, AP-T
Rate of fire: slow (200-300) and high (550)
Ammunition carried: 500 rounds
NOTE: only one source found sofar on this. Typical loadout 340 HE-Frag; 160 AP.
NOTE 2: Gee, found multiple sources. However in English it seems it's all Wiki, so here are two Czech ones (sorry).
http://forum.valka.cz/viewtopic.php/...-BVP-2/t/10482
http://www.csla.cz/technika/transportery/bvp2.htm