From DR strings:
"Thanks for your inquiry but we do not offer specific tension charts for any of our models. Here in sales, all we are told is that every set we make is set on the lathe to a medium tension. Production does not issue the exact numbers.
Our apologies,
The DR staff"
So much for kicking the tires. At least they got back to me.
Bummer. I'll still try to get some here in case you want to give them a shot.
My experience with DR's hex core strings is that they feel stiffer than their roundcore strings. So Nickel Lo Riders (nickel on hex core) should feel more stiff than Pure Blues and Sunbeams (both are nickel on round core). Of the Pure Blues and Sunbeams, I'm not sure which is more stiff. Before becoming a flatwound guy, I played the Sunbeams and loved them.