I believe the plated bullet manufacturers recommend upper lead to mid jacketed data. Velocities are given as a max, usually 1200 and 1500 depending on the type plating.
One data issue I have with plated is that there is a lot of variation in the comparison of lead and jacketed data with different bullet weights and powders. What one would expect is lead data is lower than jacketed, with perhaps a bit of overlap, given the same bullet weight. Unfortunately, some powders don't cooperate on this. Some powders have a large gap between max lead, and start jacketed. I am leery of loading past max lead in those. Other powders have lead max higher than jacketed max. Go figure.
I have had poor results loading to max lead where there is a big gap between lead and jacketed data. Best results have been when there is an overlap, and I load to max, or near max lead levels.
For a new reloader, the data conundrum can be very confusing. Heck it's probably confusing for some of the old heads as well. I have switched from plated to coated. I still like the Xtreme 158 grain hollowpoint for .357 magnum in my rifle. I get nearly identical results with coated lead SWCs now, for less money. I still like the look of the plated HPs.