I also have a new model S 70D, about two months old. At my home charger, my TRIP setting from my home 14-50 has yielded me between 235-240 miles of "charge". My non-TRIP setting (the usual one) is about 185 miles.
I haven't ventured out out of town much yet, but just thinking about driving between my Montgomery, AL home and Tallahassee, going straight without a supercharger (which would take me well out of the way via Greenville, AL). The trip is listed as 194 miles, mostly on two lane US highways. Would that make anyone overly nervous? There is a convenient 14-50 I have located on PlugShare in case I needed a safety net, but hoping to make it straight to the Tallahassee supercharger Advice?