You could try DR Hi-Beams, Sunbeams, or Tapercores.
They have a round (vs. hexagonal) core which may ease the tension.
They're all roundwound and come in "medium" sets with a 105 E.
Difference is the Hi-Beams & Tapercores are Stainless and the Sunbeams are Nickel.
The Hi-Beams also come in a "Heavy" set...50-70-90-110
I tried the Tapercores (round core exposed over the bridge saddle).
Yikes!

I thought I was playin' an old honky-tonk pi-aner.
There's also Thomastik-Infeld Jazz Roundwounds ($++). Also wound on a round core.
Great feel and insanely high output.
Am I in the right forum?
