For those that posted 5.3 is max for 230 gr FMJ, Hodgdon's max of 5.3 gr is for shorter 1.200" OAL/COL and Lyman #49 max of 5.8 gr is for longer 1.275" OAL/COL.
So if your pistol/barrel requires longer OAL/COL (I think most would load 230 gr RN longer than 1.245"-1.250"), 5.3 gr would not produce max chamber pressures.
When I did my work up for 230 gr X-Treme plated RN, I tested 1.255" - 1.265" OAL/COL and used 4.6 gr as my start charge. If you are using longer than 1.250", I would suggest 5.0 gr to start and see how 5.2 gr compares. If you are using longer 1.265" you may need to test 5.3-5.5 gr.