If you try many lubes and loads, you may eventually find lube residue even on 100 yard targets. After more than forty years of casting, sizing, lubing, and shooting rifle and handguns, I've gotten to the point where I use only two lubes, both commercial: a half & half lube and LBT Soft (which isn't real soft, but it's softer than a hard lube). I've tried many hard lubes for rifle and handgun bullets and I've never been able to tell that they offer any advantage over the two mentioned.

Bullet fit remains far more important than lube anyway.