I still have many spools of D97, will be making mostly those for at least a few more seasons.

I know it had to have made Kirk twitch when I put a 16 strand D97 on his Sasquatch but that string  never even needed half a twist in 20k shots. It was seriously prestretched and low temp burnished before going on the bow.

BTW, as much as I loved the sound of the B50 on that Hill I had to swap the D97 back in Friday night. Just getting more consistency (even if it's all in my head.)

Thanks for all the food for thought!
Thom

I've never used Astro Flight, and Brownell gives so little information on their products I really can't tell.  They say it "performs like a combination material", so the implication is it's 100% HMPE.  May be SK75 or SK78.

Sorry I'm not more help here.