There currently is a bug for the perk field scout with it not working for any weapon that has that perk and has it equipped, whether that being The hard light, corrective measure, vision of confluence, fang of Ir Yut and so on. It stays with the original ammo count and just takes up the perk. I dont know whats going on, but some information of the issue would be appreciated. Whether or not you're taking additional ammo at least a different perk for those weapons would be alright.