Plated bullets vary in quality so to speak. Speer Gold Dots are a plated bullet but with a heavy layering of copper in a different league as that of Berry's, Xtreme, or Rainer. Google TJ Convera for good service and prices on Berrys plated bullets.
Plated bullets are loaded at lead velocities, and hence you use the lead data.
Over crimping them can strip the plating. I have shot a lot Berry's 45cal RNHB thru my USPf 45ACP. Never had problem with them. Since Glock and HK uses similar polygonal bores.....