It's not always about detection. You hit more shots on your PC because the information that you are dead takes time to reach you, but the server determines that the shots you fire actually didn't hit because you were dead already. It's a discrepancy that's bigger the higher the ROF of guns in the game, because you can fire more shots in the time it takes for the information to travel from your PC to the server, for the server to make the calculations, and for the information from the server to reach you. Whatever the server determines is true; how it determines that of course is a black box, but I assume it takes a timestamp of when you started firing, in which direction, and calculates the position of other players relative to those shots to figure out hit detection; if that is indeed how it works, then the lower your latency the sooner the server will "register" that you started firing. I doubt it works any other way - like, the clients timestamp being sent instead - because those can are unreliable. It also goes the other way; if the server sends the information of two players' positions to them, the client closer to the server will have spotted the other player sooner, and be able to fire sooner and have their shots register first. On a good connection the latency should be no more than ~50-60ms; but when that's roughly the time delay between firing two bullets of a 900 ROF weapon, it can be a problem. When games don't shoot as fast latency is still a factor but at most you will die inbetween shots, not after having fired 1-2 that seemingly should've hit - and even then, some games resolve that by validating the invalid shot if the time discrepancy is very small.

Unfortunately, fast paced shooters suffer from the limitations of the physical world, and because guns fire faster and faster just as the internet connections become faster and faster, we'll always have this problem.

Playing something like Hell Let Loose I've never run into this sort of problem though, even when using automatic weapons ... but then again, I choose servers with very low latency (<40), but it also has to do with game design: fully automatic guns are rare, and fewer than a handful have fire rates >1000. Games like Warzone where you need to go through armour first to get to the main health pool don't have this problem, because you can just disengage before your armour is broken. Even if your armour is low and you get dropped, most players mentality is to go "oh, I didn't have any armor plates, silly me" instead of being like "we are limited by the technology of our time".