Okay, here's my problem.

I recently found the Ratslayer (I think that's what it's called, the Sniper with the Silencer, it's a unique gun I think), and I decided to do some night time sniping, seeing as it has a Nightvision Scope.

So, I leave the Broc Flower Cave, and I see some Legion soldiers near the Legion Raid Camp, I am working for the Legion, but I have discovered that if you can kill something without them seeing you, you don't lose any Fame with that faction.

So, from the tip of Broc Flower Cave, I shoot a Legion Soldier standing way over at the Legion Raid Camp, I didn't kill him, but I just watched it, it said "Caution" then, he starts running, ALL THE WAY OVER to Broc Flower Cave, I'm in Sneak too!

Is this suppose to happen, are they suppose to be able to find me from that distance? I don't have a Pip-Boy light on or nothin', they just always run over, even if I just shoot them once, they run over and find me!

It's not super annoying, I'm just a Sniper really devoted fan, so I'd really like to be capable of remaining unseen at night time whilst shooting the enemy.

Or, if anyone knows, does it have anything to do with the fact that I only have 19 Sneak? I know it's low, but I still can't imagine that coming into the distance I've shot him from, I have all my View Distances at the highest they can go (Without going into the .ini and increasing them there, if you can), and I believe that if he was just a small amount further away, he wouldn't show up, even when I'm using my scope.

Also, he's a Legion Veteran, so does it have anything to do with his Perception?

Anyhow, bug or not, this game has been great fun so far, I felt my self trying to put the game down at the start, just because I'm a huge fan of Todd Howard and wanted the game he had most involvement in to be the best, but this game really is better than F3 (In my opinion, anyway).

But, yea, any advice, such as possibly a Mod that changes that, or any Tweaks I can do, or if you can tell me if it is my Sneak Skill, I'd appreciate it greatly.

Thanks.

Yea it's always been that way. They always go to the spot where you attempted to shoot at them. If you would of stayed sneaked and moved far left or right, he wouldn't of saw you and turned around and walked the other way.

So I: Shoot, Move, Shoot, Move, Shoot, Move, etc?

That does sound a lot more realistic, such as what a real Sniper might do, but I'd still like to know if I could tweak this somehow or if a Mod can change this, I don't go Sniping much but when I do I'd prefer them to stand around and be all like "The [censored] is shooting us?"

Thanks for the response anyway, at least I know it's not a glitch.

Also, if anyone could tell me any of this, which is the most powerful Sniper in the game? I've only had the Ratslayer, and I've yet to see another Sniper (I think you can get Scopes for the Laser Rifle, but I have a low Energy Weapons Skill).

If I can kill NCR Rangers or Legion Veterans in one, I wouldn't need to move position.

Also, what Skill does the best Sniper in the game use? And where can I buy it?

Thanks again.

Kinda on the uhh spoiler side but here http://fallout.wikia.com/wiki/Fallout:_New_Vegas_weapons

I think the sniper with the highest damage per shot is the http://fallout.wikia.com/wiki/YCS/186_Gauss_rifle (unique Gauss Rifle). Second to that is the regular Gauss Rifle. And then third would be the http://http://fallout.wikia.com/wiki/Anti-materiel_rifle.

You'll be able to kill any human target with one sneak attack critical from any one of those rifles.

Thanks guys, I've noticed that with the Ratslayer, shooting a NCR Veteran Ranger in the head with Lily (Who gives +10 Sneak DMG I think) takes off 1HP bar, so I really, really need something more powerful.

Edit~
Oh, God damnit!

I have Wild Wasteland (I wish I never took it, I've had it twice now and I either didn't realise the Easter Egg or I didn't see it) and it says the YCS/186 carrying Merc is replaced with Aliens...

My biggest decision is now: Cheat and use Console Commands or just go for the Gauss Rifle or Anti Material Rifle.

Well the Anti-Materiel rifle is infinitely cooler than the YCS/186, and despite it's lower damage it will still give you the one hit kills on human targets that you're after.

With that said, if it was me I'd just spawn the YCS/186 anyway. That's the only way you can get it. Don't think of it as cheating, just think of it as getting back at the game for cheating you out of a weapon lol.

Yeah, the Ratslayer is a cool little gun but it’s actually a unique version of the varmint rifle, so its not gonna be what you wanna use for sniping a tough enemy.

I think the posts above me covered what you’ll want for that, just remember some of those guns have some pretty high strength requirements.

Besides that, the La Longue, the All American, or a good scoped rifle will do you just fine for most stuff you’ll run into out there.

Yea, I went to Vault 34 and I found the All American, I liked the Marksman Rifle so I'm enjoying this gun.

There is also a Very Hard locked Footlocker, my Lockpick is only 50, darn.

And what I plan on doing to get the YCS/186 is going to that place where it should be and killing the Aliens, that way, it's not as much cheating, it's rather you done what was required, you just can't get it because you picked the wrong perk, so you need some help!

Anyhow, thanks for all the answers, I'll probably get the Anti-Material Rifle and the YCS/186.

within certain distances, enemies won't go all the way up to where you are.

from the cliff right under sniper's nest near cottonwood cave you can snipe the entire legion camp without being hit by any enemy.

also do this:

player.additem (YCS itemid)

player.removeitem f 3000