Ackley's book shows the 33WCF pushing a 200 gr bullet anywhere from 1600 to 2400 fps. The new 338 moves a 210 gr in the 2500/2600 fps range. Reasonably close. Ackley wrote " The .33WCF was a powerful cartridge which has given a good account of itself on all types of North American game". It became obsolete in 1936.