I use dacron flemish. I dryfired once about 12 years ago(don't quote me). It was freaking loud. Just about put a load in my pants over that! The limbs are carved.
I think there are more than 5 of us and that the others are lurkers! LOL.
As I said earlier I kinda think that Excal is not making them available any more according to my dealer. I'm sure that for a moderate price a dacron flemish string can be made.
As far as quiet goes its mostly for me but then again if I miss then maybe a deer 50 yards in may still come out, but thats just a maybe.