I also like WST,I have reloaded 230 FMJ and just moved to Berrys 230gr RN.I worked the load up from 4.4 gr to 4.8 gr seated at 1.255, very nice to shoot, low recoil and clean. I also reloaded some 230gr xtreme hp which are also plated, I loaded them with 4.5 to 4.6 gr at 1.235 same as the other soft shooting.
I dont have a crono so cant help you there, 4.6 gr should give you 800fps in 5in guns ( Thanks Fredj338 ),seated to 1.255, You can go to 4.8gr as max w/ WST, makes right near ball equiv @ 1.255" w/ a 230grRNFMJ. ( Thanks Fredj338 )
Hope this helps some just as you know work the load up, stay safe