SK-105 probs

[Siddhi]

It looks like the SK-105 Kurassier is lacking the OFL 105 G1 SABOT round, at least going on performance - on about 10 hits on a t-72A with the G-105mm cannon (frontal) i have not had a single penetration, however the OFL 105 G1 SABOT is supposed to penetrate Nato tripple heavy target with 550mm penetration, the t-72A has the equivilant of ca. 440mm armour - so no problem, in theory. How however am I going to get the OFL 105 G1 SABOT into the game?

Also, the SK-105 has a "double barrel" autoloader which on the one hand allows the first 12 shots to be fired in 4-5 second intervals, OTOH however requires reloading from the main drum after the rounds are fired (40 rounds can be carried in total). If I tried to incorpoerate this, how would I proceed?