Using the Hornety Ballistics calculator.
Your Input Variables
Ballistic Coefficient 0.212 Velocity (ft/s) 1000 Weight (grains) 147
Maximum Range (yds) 1000 Interval (yds) 100 Drag Function G1
Sight Height (inches) 1.5 Shooting Angle (degrees) 0 Zero Range (yds) 1000
Wind Speed (mph) 0 Wind Angle (degrees) 90 Altitude (ft) 0
Pressure (hg) 29.53 Temperature (F) 59 Humidity (%) 0.78
Ballistics Results - 35580 2.19 lbs MVelocity Range (fps) 750-1200 Ballistic Coefficient (G1) 0.212 S 0.167
RANGE (YARDS) VELOCITY (FPS) ENERGY (FT.-LB.) TRAJECTORY (IN) COME UP IN MOA COME UP IN MILS WIND DRIFT (IN) WIND DRIFT IN MOA WIND DRIFT IN MILS
Muzzle 1000 326 -1.5 0 0 0 0 0
100 916 274 276 -263 -76.5 0 0 0
200 850 236 512.3 -244 -71 0 0 0
300 795 206 700.6 -222.6 -64.7 0 0 0
400 746 182 833.9 -198.8 -57.8 0 0 0
500 702 161 905 -172.7 -50.2 0 0 0
600 660 142 905.8 -144.1 -41.9 0 0 0
700 622 126 827 -112.8 -32.8 0 0 0
800 586 112 658.1 -78.5 -22.8 0 0 0
900 552 100 387.1 -41.1 -11.9 0 0 0
1000 520 88 1 -0.1 0 0 0 0
So if it started at 1000fps, it would be down to 520fps by their calculation at 1000 yards.