Ehh idk man.. He's got a 9-hit count and that seems pretty close to accurate. He's running 9mm, and I'm assuming by your level... It's not even AP6.3 and would be surprised if it was a 30rnd of PBP...
Slow-mo, I feel I agree with you, his tracking is decent but watching it in real-time and knowing the mpx he's bouncing all over the place; the rof and all, it looks like more misses than hits on top of, if it's pst gzh, if the guy is wearing anything higher than 4 and you're not hitting the face; you're fucked. Watching it seems like it's not a 100% kill, but if it were me... I'd still feel the same, he fucked the guy up(also you have 440hp, not 400hp). I wish I had it recorded for you but I had an exchange two nights ago similar but with a pp-19.. drawn-out fight, black limbs, and all.. I dumped 3 mags into various parts of a 3man.. it wasn't until I slapped single fire and started tap firing.. go to find out two of them had a gzhel and korund.
If you didn't know, the recoil system works like most fps now.. When firing it goes straight up for a few bullets, and eventually hits an apex and becomes more sporadic in its bloom/moa.. which is why by the end of his mag and when he's standing still you're seeing shots smacking the transformer.. ontop of him swaying left and right of the person with his reddot.. he is realistically all over the place.
I think the only thing I am not sure about is how it factors armor damage now in the stat screen which could alleviate most of your owe.. since durability isn't the same anymore. You can hit the armor with bullets and it'll take a zero durability burn.. which effectively means your bullet is null.. so does that count as a hit or does it count as damage asborbed.. ect ect. It could be likely that the armor damage you see is the side soft armor plates taking damage from when hes blasting stomach/chest or in side on the sprint. Which often, soft armor seems to commonly sit around the t2 to t3 plates.. but even if the guy was wearing level three plates, aiming chest/stomach just isn't the play with anything less than AP6.3 in 9x19.
On top of it all, you died walking in the middle of the weather lol. If you didn't know, there is a spawn next to it and you were coming from construction. Should always assume someone is in weather by that point, esp this early in the wipe when everyone is not rushing to resort.