Since no one has responded to your question I will offer my reference from 6-7 years ago and I'm going by memory so don't hold me to the exact fps. I'm going to use two different rifles. One a 20" ltr and a 24" 40x. the 20" would give between 2587 and 2615. the 24" would give around 2660. I'm getting a little "long in the tooth" but I believe these figures to be very close. Hope it helps. I don't use those cartridges anymore as I'm a Berger shooter as of late, when I can get 'em!