A couple of footnotes here. First, I've had my FN 5.7 for several years now. I've never had had the sights fail to hold zero. That includes carrying a fair amount in the field, carrying concealed, etc. That also includes changing zero several times for different loads.
The ammo used is the so called "hunting load." It uses a 40 gr. Hdy V-Max bullet at 1740 fps. It expands very rapidly upon impact, and causes a lot of damage. Does everybody remember the Ft. Hood shooting ? The shooter used that ammo. Three of the solders killed tried to charge the shooter. None of them made it.
I'd also add that the service ammo and the so called practice ammo use a non expanding 27 gr. bullet at 2140 odd feet per second. After passing through the barriers it's designed to penetrate, it tumbles. It, BTW, shoots several inches high over the 40 gr. V-Max load. It also blows apart my 2.5 gallon water containers just as well as the 40 gr. loads. Neither load will exit after 12 inches of penetration. E
