I was given a couple boxes of older Federal ammo, one is a jacketed hollowpoint in .38 Special which I don't know the weight of but I am thinking either 125 or 158 grains, but the other are these hollowpoint wadcutters. I have never seen any of these before and I was wondering if someone could give me an idea about them. Both the JHP's and the wadcutters are in nickel brass with "Hydrashok" on the head stamp.