Lots of really dangerous places, really. My personal unfavorites are places with mobs of deathclaws or my pet hate, giant radscorpions. I loathe those scuttley bastids - is it my imagination or are they a hell of a lot tougher than they are back in DC?
They are, with DT being implemented for them unlike in FO3. Now, you need either overwhelming damage output or AP rounds to make enough of a difference, especially with one skittering towards ya.
Always seems for me they zero in on my position if the first shot doesn't kill them. They make my skin crawl more than any other creature, especially with how fast they can move.
Well...er... would you care to give a detailed play-by-play? Tips? Hints? GAAAAH!!! My character just reached level 12, and they are killing me within minutes. Nothing I hit them with has any effect on them, although Veronica punched one of the Mr. Handy's out. I have been doing Med-X and Psycho mixtures to hit them harder - I may take that robotics perk next time I level up and try that. I have been hitting them with 40 mm grenades, the Gauss, - nothing seems to phase them.
They're actually not all that special of a bot, in spite of the "hardened" name. They have a DT of 0 and just basically have a high HP. Soften them up with some sneak attack crits or otherwise use something that spits out lots of damage. Dunno about hollow points, but I bet those could be used to good effect. I stick to using hand loader ammo and AP rounds.
And pay mind that your skill is high enough for whatever weapon, though I wouldn't know if a Gauss rifle would be powerful or not, only ever really stuck to ballistics.