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More information could be helpful. Are you loading them to use in a .357 mag or in 38 sp? If 38 sp no problems. Most copper plated bullets are loaded in between lead and fmj charges. You can start with low end lead data and work your way up 0.2 gn at a time to mid range jacketed charge till you find what you like. If for .357 mag they may not be ideal particularly if you want full power like factory mag loads. You start to worry about plating separating and crimping can be an issue. .357 mag factory loads use jacketed bullets with a good roll crimp to hold the bullet in place under harsh recoil. Using a roll crimp on plated bullets can cut into the plating causing issues. You can taper crimp them, but It may not hold so beware of the issue.
What brand of bullet are they? Some platted bullets have thicker plating than others and can be pushed a little harder. I know not of what you speak regarding wax on plated bullets. That's a new one for me.
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