Yes I remember that very well Stanley! I haven't read your post but I remember posting and saying wow.. I think :)
But a 24 is not CO2 either :-) Jeff didn't get it with a head shot. Actually with a head shot you don't need much power to take out a crow, or squirrel/rabbit, etc.
I shot a crow at 11-12yds I think with a Crosman wadcutter too, many years ago with a 760 pumper (10 pumps) which was about ~550fps with most regular pellets. The Crow reacted and raised its wings and then just flew away. I saw the impact in its chest. Then on another day I shot 1 with a BB which had 610-620fps MV, at around 15-16yds - same thing. That was probably a bad thing because the BB's are like 5-5.5gr and have less energy than a pellet. I used to take out Starlings with those BB's at 30-35yds, but it did nothing to a crow. Did the same stupid thing thing with a racoon. It was terrorizing my mom & sister and wouldn't leave the deck so I opened the sliding door slightly and shot it from 10ft in the head with 10 pumps. It just ran away. Ah if I can only be 14 again :)