Yeah, check you have the right car in your profile. I wouldn't be doing a 170-mile round trip in my SR in summer probably, although I do have a rather heavy right foot. My GOM range at the moment is generally in the 160s, and I saw 150 a few weeks ago after some fast driving on a cold day.
In summer my GOM range tends to be around 190-220 miles depending on the way I've been driving.
I knew about this when I bought the car, because I remember asking the salesman whether it would do a 100-mile round trip at fairly fast speeds in the depths of winter with the heating on and being told yes.
It's slightly odd because if you have an LR (as would seem to be the case) that is an NMC battery and as far as I know they are not so affected by cold as the LFP SR battery. I wouldn't have thought the LR would lose quite so much range as that. Though if you were driving fast on that trip it could explain it.