I have 2 TF99s, 177 they are very good guns as far as I can tell. I have 10 or so air rifles these two seem to be the most accurate of my collection, I think because of the weight and the fixed barrel. I have a range set up in the back of my house at 100 yards 75, 50, 25, I can hit a cambells soup can more consistently with the 99 than any of my breakbarrels. I hold about 8 inches high, hit the can 8 out of 10 times at 100 yards. Good power all my guns are rated at 1000 fps with lead. dont have a chrony but they all seem to have about the same power.