I'm looking to get some better string material.  I don't know much about them.  Which one would be a better buy D97 or BCY450 plus??

450+ is quieter in the sense that it seems a bit softer and wont slap the limb of a recurve in quite such a noisy manner.

Heck I do not know but I do know Oliver Stacey, sponcer here and string maker recommends 450+ for longbows.  I have strings built  him with the 450+ and they have been really awesome.

Bob.

I carry both, they both work fine.  Dynaflight '97 is more durable, and easier to work with;  450+ has a little less stretch and creep.

If I were going to invest in just one material, I'd go with either Trophy--basically the same as 450+, but with GORE fiber to reduce fuzzing and a smaller diameter strand--or 8190.  

8190 is 100% HMPE (no Vectran, as is in 450+), very low stretch, very low creep, very small diameter strand.  This is the material Hoyt is using on their high-end wheel bows.

Between Dynaflight '97 and 450+, I'd pick Dynaflight '97.  I'm considering selling my stock of 450+.

Chad

Hey thanks for the replies everybody.  I really appreciate the info