You have three basic types of string material.
Polyester (dacron), which is B-55 or B-50. B-55 has slightly less stretch and creep, but either are safe for any bow...except Jack Harrison (Black Wolf) would void your warranty if you used dacron or a Flemish string (go figure).
Next is 100% HMPE or UHMWPE. A couple of popular brand names are Dyneema and Spectra. The original Fast Flight material (invented by Ray Browne and Bob Destin, founders of BCY) is SK65 Spectra but the better HMPE materials now are Dyneema. The best of these IMO is Mercury, but there are many professional archers including Olympic archer Brady Ellison and recent World Champions Dewayne Martin and Calvin Smock still use 8125. Dynaflight '97 is also a very popular version of a 100% HMPE material.
Finally you have the blended materials. The first was 450 Premium, invented by Bob Destin of BCY. This led to 450+, then 452X and Trophy, and the newest is BCY-X. BCY-X is my current favorite, and unlike pretty much every other material it's patented so nobody else can try to copy it.
The only material on the market I know of that's not recommended for Flemish strings is Angel Majesty. It's for endless only.
How the string is made...the twists, the strand count, etc. makes as much or more difference in how it feels and shoots as the material it's made from.
Don't expect to pick up 20 fps when switching from dacron to one of the other materials. Where these materials really shine is in durability and stability. They do cost more--price per spool is noticeable, price per string difference is negligible.
I usually have some extra material around that I can sell at a bargain, and I love to see someone getting started making strings. From what I've been told our video is pretty helpful.
If I can help, feel free to e-mail me at
[email protected].
Chad