That's your choice. But I think there's a reason why they publish separate load data for jacketed and lead bullets.
Absolutely, but I'm going to bet it is for more in line with my thought reasoning over chamber pressures going wild(Which was what got me motivated to post about it here.).
Don't misunderstand me, I have an incredibly strong sense of self-preservation. I would never switch over to another projectile and start loading where I left off, lead or not.
I can dig out data showing lead and FMJ loads that max out at the same charge of a given powder. Regardless: We all know(hopefully) that reloading requires a plan, a process, and it is all about being safe.