Bill, I am currently using a load of 46Gr's. of RL-17 behind a 140 Gr. Sierra Spbt., using Winchester brass and Russian primers. I haven't chronographed the load yet but according to published data on the Alliant Website, I shoud be running around 2820 to 2860fps. Shoots consistantly around 1/2 inch from a Lilja barrelled Rem700. Barrel length is 21inches. This load is used primarily as a Whitetail Deer load here in Pa. Hope this helps.
P.S.- My long range load with this caliber is 43Gr's. of IMR-4064 behind a 140Gr. Nosler BT using Rem 9 1/2 primers. As always reduce these loads and work back up with your rifle. Hope this helps.