Special ammo can be changed mid fight, not sure if this classifies as a bug but since other things such as temps/weapons/armor cannot be changed I thought it may be.
Attack log where I was able to put on incendiary rounds mid fight:
https://www.torn.com/loader.php?sid=attackLog&ID=1e3ee3c74781111b449887da971f4848
Attack log where I was able to put on incendiary rounds mid fight:
https://www.torn.com/loader.php?sid=attackLog&ID=1e3ee3c74781111b449887da971f4848