I use 303 and WNMG inserts. Use constant surface speed: 203 ft/min (62m/min). Feed per revolution 0.01" (0.254mm), roughing step down to 0.0315" (0.8mm) I set maximum spindle speed to 1500.
Breaking very nice C and 6 chips, lot of coolant, inserts lasts forever. I would start with these parameters.