+4 to bullet fit, bullet fit,bullet fit. You can make a bullet hard enough to shatter and it will still lead if it's too small. Slug your bore, then use an alloy appropriate to the purpose and velocity you're chasing. I've been doing some rudimentary expansion testing with my .308. 50/50 clip-on WW/pure lead. It expands well, holds together, fits the bore, zero leading. But the same can be said for the Lyman #2 and dental x-ray lead bullets I was testing as well. The key is fit. Then decide what you're using the bullet for.
