One thing that I've learned with lead, is sometimes you have to load up and down, until you find a sweet spot.

Especially with those bevel based designs, that seem to plague everyone but me.

I've got a pretty good idea what performance level I want by now, so I'll load up maybe 3 batches of 10, at different levels (something like 9.5, 10.5, 11.5gr of unique, etc.) and go out and take notes.

If I've got time, I'll carry a little LeeLoader with me, and experiment further.

Early on, a fellow shooter told me he coated ALL his lead bullets in Lee Tumble lube.
I did that on some bullets that seemed to lead regardless, and it worked good.
They weren't purdy shiny silver anymore though:)

One other thing, some people I've encountered consider "dirty" to be leading.