I've had a 5.7 FN for several years now. The original version FN pistol weighs 19 ozs. empty. The 40 gr. V-Max ammo clocked 1740 fps. in my gun. Using my 12 inch long, 2.5 gallon water containers, it will blow the front half apart at 10 yds. The bullet fragments and the base of the jacket will dimple the back of the jug.
It will group about 2 inches at 20 yds, and kicks with 40% of the recoil of a 9mm.
I have found it an easy to carry field gun.
I gave up trying to reload for it. Too critical and lots of brass flow. E
