Three of us just bought Sendero SFII's in 300 Ultra and are working up 200gr Accubond loads. This morning we shot loads from 89 - 92 grains of Reloader 25. Accuracy was good across the board, but velocities from the chronograph were not IMHO. We averaged velocities from 2820 to 3030 with the various loads. We had expected to be somewhere close to 3150 or 3200 with the 92 grain loads. One of us used another chronograph a couple of days ago and averaged 3170 with 90 grains. Are we getting bad readings from this chronograph or both? All three of us loaded our own ammo on our own equipment.