That depends on what caliber your loading for.
With 9mm, 40S&W, and 45ACP you would be hard pressed to get to the 1200fps that most plated bullet mfgs say there bullets are good for.
If your shooting .357 mag or something larger, then you need to observe the speed you shoot them at and stay in the limits the mfgs put on their bullets.
If you buy Thick plated bullets most of the mfgs say 1500fps is the speed limit for, then you don't exceed that.
With .357 Mag it would be hard to exceed that, and so on.
Cast data, Jacketed data, it just doesn't matter as long as you stay with in the speed limits put on the bullets by the manufacturers and don't drop below mid range lead data.
I load to max in my 9mms with 1200fps plated bullets but stay in mid range with my .357mags and 41 mags with 1200fps plated bullets. I try to keep them under 1200fps.
If I notice copper streaks in my barrel when I clean it (which is after every range trip) than I back down. I do see copper every once in a while but not often, but I like to push them so it's to be expected for me.