So, I believe that Ackley's velocities were like Ellwood's. WAGs
Ackley had instructions for making a momentum "chronograph" with an old tire on a pendulum. Can't imagine that would be very accurate or the math involved to convert tire swing to FPS. Good thing that chronographs weren't readily available then as all the wildcatters would try to load up to claimed velocity levels. It probably would have cut down on the number of wildcats too when everyone found out you were only gaining 100-150 fps with the wonder cases.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
