Here are the results of a chronograph test taken with the Gamo Hornet Maxxim .22 cal air rifle with various lead pellets.
Crosman Premier Ultra Magnum 14.3 grains – 735 fps
H&N Field Target Trophy 14.66 grains – 706 fps
Beeman Kodiak 21.14 grains – 597 fps
Here is the Gamo Hornet Maxxim air rifle review with the chronograph testing.