Were you revive-able? If not, headshot.

I don't usually agree with Cat Merc, but he's right here, at least partially. I've had it happen as well with Charged SR's. My Adv suit with a little over 700hp has been OHKO'd a couple times by them. I was able to call for Help afterwards which shouldn't happen with a headshot.

Assuming the potential max damage you guys are calculating is correct, it's likely either the call for Help function has an issue or the damage is calculating incorrectly. No idea which.

Headshots for the SR need to be increased. i say 450% like my scrambler pistol..

OP was probably too slow to realize the first hit, that sounds like 2 hits from an Ishukone in a caldari suit with complex damage mods... Headshots for the SR need to be increased. i say 450% like my scrambler pistol. Scout-sniper needs to be viable and without damage mods, you're just picking off other Scout suits or finishing people off that your frontline fighters have weakened. damage mods ruin balance and need to be nixed.

Possible explanations:
Damage glitch
Sniper stats are showing incorrectly
Hitboxes are screwed up and somehow the game decided that my body is my head

Any of these requires a fix by CCP, which is why I made a thread.
No, I'm not saying snipers in general are OP.

I don't usually agree with Cat Merc, but he's right here, at least partially. I've had it happen as well with Charged SR's. My Adv suit with a little over 700hp has been OHKO'd a couple times by them. I was able to call for Help afterwards which shouldn't happen with a headshot.

Assuming the potential max damage you guys are calculating is correct, it's likely either the call for Help function has an issue or the damage is calculating incorrectly. No idea which.

Other possibilities:

Your head wasn't as hidden as you thought.
You're QQ.
You can't do basic math.

Kill feed told me who did it and how much damage he did.
If it was two people the damage would have been split up into two.

Only it was.
Don't believe me, have fun with glitched snipers.
Hopefully it will happen to you too :)

I'm not 100% on this, but the Kill Screen seems to give total damage done to you, as opposed to total damage that killed you. For instance:

If you have 300 Armor left, but my shot does 500 dmg, then the kill screen shows 500 dmg, regardless of the fact that I killed you for 300 eHP.

My reasoning for this is because on my kill screens, I have seen more dmg done, than what was actually available to me. I run a proto minmatar medium frame and my eHP is only 285, but I have been sniped and the kill screen reported 300+ dmg. So it is perfectly plausible that you were in fact hit at least once before you were sniped and the dmg amount showed higher than what you actually had available to you.

No, it doesn't.
The reason why sometimes it will show you more damage than you have of eHP, is because it also counts if you recharge.
So lose 400 HP, recharge 400 HP, lose 400HP and die, 800 damage.
But it only counts if its from the same guy.
I had times where I was in low health and a guy killed me, and it said "damage done to you, 34 HP"

head shots do not cause instant bleed out, i'm not sure what started that rumor, but I snipe lots of people in the head or the body and they don't instant bleed out no matter where I shoot them, they only instant bleed if you deal excessive amount of damage to them, which a head shot will usually be, but not if you have 700+ ehp

as for the cover I highly suspect your head was just out of cover it only takes a single pixel to not be in cover, some times not even that if the hit box is positioned well.

I can't debate this point, cause you could be right.

However, Cat, as a dedicated sniper, perhaps you did get glitched, but your circumstance, if it happened exactly as you said, is far and few between, at least from a standpoint of being reported by other players. From my own personal experience, I have never OHK anyone for 700+ dmg except on a headshot.

I'd be interested in knowing exactly what your fittings are. Perhaps its not a glitch with snipers as much as it could be a glitch with your mods. At the very least knowing what your fittings are and comparing it to other players who have had similar situations, might actually tell us and Devs what might be going on.