When I saw Jeff Bradetich playing Gary Karr's Koussevitzky bass, it looked like they were the Corelli mediums on it even though he was in solo tuning. I wasn't right next to the bass so maybe I didn't see the colors quite right.
You could probably string up just about anything on it and would still sound killer...

...but I remember reading Gary rave about Corelli strings in a mag article somewhere.
Anyway in the Dragonetti concerto recording I have of Gary, there's a lot of pizz sustain in his cadenza in the 3rd mvmt. It makes me wonder if he was using spirocore solo strings or something similar for it.