So I have a little bit of a problem. I have nearly 300 hours of game time invested in the game. Most of it was using Scar. Not always, but enough.

So here's what happens. Some players seem to deal more damage with the scar. I don't know why, but it takes them like 5 bullets to kill me, whereas I need 15 or more with the same weapon. No laser, no Armor enhance on both sides.
I see the enemy, I start shooting, I haven't even shot 5 bullets(maybe even less) and I am dead. And I do notice a lot of headknock indicating more damage. I don't think this is a hack.

Perhaps it has to do with recoil control? Some tips would be nice as it svcks not being able to kill a guy, cause he can deal more damage.

The only theory I have is micro optimisation of the aim of the weapon(in real-time) to reduce recoil.

I remember shooting a guy with 1 bullet with the scar, no he wasn't in low health lol. xD

No this is different, it's not luck or chance, or low health.