Just got into Lonesome Road and got OHKO'd by the deathclaw there. Specifically, the deathclaw that ambushes you when you get into a small trailer, but I assume others also have the same firepower.

I'm asking because I have 170 HP and 46 DT for an effective health of 216. Even the deathclaw in Sloan doesn't OHKO me with lower DT. 3 strikes IIRC.

What the heck is going on?