The magnetic form factors of (Ni_0.6Fe_0.4)_1-xV_x x=0.095 and 0.159, have been measured at room temperature. The experimental data are compared with a form factor for x=0 obtained by interpolation from literature data. It is concluded that, though the constituents seem to retain their individual properties in binary Ni-Fe alloys, the Ni-Fe matrix is affected as a whole by addition of the V impurities. Therefore in this respect the compounds investigated can be considered as pseudobinary alloys. The addition of V causes an overall decrease of the average host moment but little change in its spatial distribution.