From an old table published by W/W division, Olin many years ago. Comparing #7 size shot at MV's of 1330 FPS & 1135 FPS. By 20 yds the V's were 930fps & 830Fps, by 40 yds 715fps & 655fps, by 60 yds 580fps & 540fps.
Thus the "Faster" load remained faster all the way, but a 195 fps edge at the muzzle had been reduced to only 40 fps @ 60yds. The slower one would never catch the faster one but the farther they go the less is the difference.
I could be wrong on this but I believe that increased drag being proportional to the square of the velocity is only good below the speed of sound. I believe the drag is even greater than that above the speed of sound with an increase of speed.
