I have been dying to shoot my new Texan .457, but snow and cold have prevented it. So today I decided just one shot in the back yard .This is really too much gun for my back yard, but no one was around and I did it. Set up a bunch of 2 X 4's at about 60 feet and screwed on the DonnyFL Emperor V3 with the extension. I fired one JSB XXL pellet at low power over the chronograph. Got 668 fps. The pellet went completely through 2 boards and came to rest against the third. Nice mushroom effect. Pretty darn quiet by the way.