Only CAS and COIN missions for Apaches they carry 1200 rounds and only when the location and hot zone is very close (under 40mins) from the AFB where the Apache flies its missions from. All other configurations for the Apache all use the additional 3rd fuel tank, the robby tank, which is a modular based fuel tank that will be fitted under the helicopter exactly where the ammunition bay for the 30mm rounds are. That cuts the maximum ammunition payload to the feeding system with additional space between turret and ammunition bay which are in total roughly 300 rounds. This layout is only designed for low value targets more as a defense than an attack, because such layouts were made to equip Apaches with ATGM's + UR to deal with higher value targets than lonely infantry on ground and the 300 rounds are there to deal with infantry.
It is also not true that ATGM's aren't used against infantry, they are, but usually they have different layout meaning HE-Frag warhead and Thermobaric, but what i suspect to be the case is that Russia never actually bought that type of ATGM's with Anti-Personal warheads, not in numbers, so they are stupidly stuck with either wasting ATGM's with HEAT warheads with limited capability against personal, scattered across or rely on striking formations against such targets those formations and tactics were designed to do.
The issue here is russia indeed never reported to buy ATGM's with He-Frag warheads and i doubt they have over 1000 of them of all heliborne variants in entire RF, which is a short sighted thing they did in the past.
Actually the US is doing it, because their MIC needs the money and advocating air strikes against 1-2 talibans in houses facing a whole platoon with Bradley and Abrams and soldiers equipped with Javelin's to call afterwards an air strike or artillery strike, is their way to go. The US army and its doctrines are dictated by money milking MIC not by actual war economics.
Yes i know about auxilary tank under fuselage which greatly reduces ammo load however that wasnt the main point of whole this discussion so i didnt even mention it. ATGMs in general are not used aganist infantry, fact that US is occasionally wasting Hellfires on dumb targets does not make it something "legit", smart or propper way of using ATGMs, they are simply throwing money though open window coz they can even they would stop doing it during prolonged conflicts aganist someone who actually can fight back. Its easy for them to spare Hellfires on low intensity conflicts where they fire 100-150 per year, in Syria Russians would spend, what 500 by now at least if they were targeting every technical these guys have with Ataka.
I would accept and greet use of Ugroza like system during conflicts like this, however use of ATGMs even with thermobaric or HE FRAG with are made for it, should be limited only to high value targets or as i said above to protect your ground units from imminent attack or to repell overpowering enemy, and tanks naturally since thats their main role. 20 enemies in building giving resistance, throw them ATGM with FAE/HE-Frag you have my blessing, spending it on a car in open field with two guys trying to figure out how to reload HMG? What about no.
After all you have S8 and S13 rockets with FAE, HE-Frag, concrete piercing and flechette warheads, introducing Ugroza would be very smart move, US despite whatever we belive are trying to reduce this waste of Hellfires that we saw last few years. APKWS, LOGIR and TALON projects are trying to merge two worlds precision of Hellfire and cost + simplicity of Hydras.
To my knowledge they did obtain certain numbers of Atakas 9M120F with thermobaric warhead, so they do exist however Russians were always putting AT role of their helicopters forward, which i understand.