My Tau 7 had an adjuster to reduce the velocity. I think Pyramidair has a manual pdf you can download.
One of the cool things about the Tau is that it is powerful, and you can shoot the 20 and 25 meter rimfire targets with them and it's just as accurate.
Hmm...interesting!
Jim
UBC's Police Pistol Manager
"Nasty, noisy things, revolvers, Count. Better stick to air-guns." Sherlock Holmes, The Adventure of the Mazarin Stone