Sweeper, thanks for hanging in there and not getting upset. Wilco and the assembled are looking out for you.
Just a tiny glimpse into what the guy's are trying to explain to you:
Just the difference in the way a jacketed bullet and a lead bullet interact with the case and the differing amounts of pressure it takes to begin to move the projectile out of the case can present a catastrophic situation with the lead bullet, when treated like a jacketed bullet.
Stay with it, read everything you can get your hands on about lead boolit loading, and check your thoughts against multiple sources.