Field experiment was conducted at Z.A.R.S., Shenda Park Research Farm, Kolhapur to study the hydraulic performance of raingun irrigation system. The performance test was carried out using twin 16 mm raingun nozzle for its uniformity coefficient, pressure-discharge, pressure-radius of throw relationship and precipitation distribution pattern under different operating pressures 2.0, 2.5, 3.0 and 3.5 kg/cm2. Maximum uniformity coefficient of 75.27 percent was observed at 3.5 kg/cm2 operating pressure, followed by 74.59 and 72.59 percents, respectively at 2.5 and 3.0 kg/cm2. It was observed that as the operating pressure increases from 2.0 to 3.5 kg/cm2, the discharge as well as radius of throw also goes on increasing from 216.0 to 300 lpm and 27.0 to 32.4 m, respectively for 16 mm diameter nozzle. The exponential and quadratic equations were found best-fit for pressure-discharge and pressure-radius of throw relationships, respectively. The precipitation distribution pattern obtained at various pressures indicated that the precipitation volume decreases with increase in distance from the raingun sprinkler. The contour map shows uniform distribution of the precipitation at distinct intervals.