They do more than that, they are about a 9 fpe gun in .177, or about 720 fps. I think with the right spring and maybe a nylon piston head conversion it will do 11. It is basically a heavy duty, better quality version of the Airsporter with a much nicer trigger and an elm stock.

If you look through Smith's book the velocity readings are consistently down on what you would expect from the rifles. I think he has the HW35 (might be wrong) shooting .22 pellets at 490 fps. The Falke has a leather piston head which can take many thousands of pellets to size properly, this might have reduced the power . The accuracy is way down as well, this was not a typical example he was using.