I'm not intending to knock the use of lead. I was just addressing some of the most common obstacles that are encountered. I have never personally loaded lead, but I have shot a good deal of it prior to ever taking up reloading, to which I found personally undesirable. And, I think it's pretty evident regarding the regular stream of questions and issues that reach this forum in this regard, that it can be a bit challenging in comparison to loading jacketed. And yes, until one has figured it out, they do complain of heavy leading problems, and difficulty trying to determine what data applies to the vast array of lead projectiles. It is also recommended to slug the barrel in order to know what diameter bullet is best suited for a particular firearm. Just more work than I care to indulge in, but lead still remains the most used projectile by reloaders, hands down.
And although some jacketed bullets, not all, do have an exposed lead base, they don't leave lead fouling in the barrel, ever, and they are loaded with standard jacketed data.
There is nothing wrong with lead, I just don't personally care for the degree of work up and research required, or the excessive smoke, and yes, lead deposits that can be problematic.
But from a positive point of view, lead bullets have some of the most lethal potential when using the right projectile and powder combination. I think the Kieth is a fine example of how well a lead projectile can perform, an obvious winner in my opinion.
Load what you want. This is a hobby with something for everyone.
GS