RR is spot on. I pay little or no attention to what the manuals list as fps/load. My philosophy is that while velocity is good, accuracy is better. The best is top velocity and max accuracy with the same load. Consistency with components is critical to achieving this. And yes, a good chrony sure helps a lot. I went for years without one. After I got one, I wondered how I had gotten along so well before without it. Go figure.......