I make my own strings and arrows for my Vortex, so will address both.
32 strand Flemish string, D97 Plus, Halo or Angel Majesty serving, gives me about 13 fps on factory Excel string.

GT Lazer II with 110 brass insert, alum nock and 2"Blazers or Fusion vanes. Tipped with 100 gr Slick Trick mags or NAP Spitfires. Weigh 405 gr, FOC=+18%, 320 fps with above string. Fast, accurate, great terminal performance. Veritable death-darts.