I've owned some of the fastest longbows, hybrids and recurves, from low 50s to mid-60s poundage, and never shot over 180 fps with any of them with arrows heavier than 500 grains. Fastest to date was a BW. These day, since I hunt elk, I am looking for 160 fps with 650grn arrows. While speed is negotiable, arrow weight is not. If I were hunting pronghorn or Coues whitetail, I'd go down to 450 and try for the greatest possible speed, as I do for turkey. Everything is relative to the game we're after.