fast flight string question??????

[BigJohn]

Does a fastflight string decrease spine?  

[Boneyard Bowhunter]

Yes. Depending on the bow 5 to 10 pounds more of spine is needed.

[JRY309]

It doesn't decrease it but you will need more spine with a FF string.I had a bow that I went from dacron to FF and I was able too shorten my arrows by 1" too keep the tune of my arrows.

[Don Stokes]

Depends on how many strands. If you make it heavy, it will shoot lighter spine. Using 14 strands vs. a Dacron string, you need more spine.