I cast 250 real bullets in 50 cal. One of the biggest pain in the butt is hand lubing each bullet individually. I have some 50 pa conicals that come in a bag prelubed what is that stuff and where to get it. If not that would lee bullet lube work and let you lube by the handful throw them in a bag and use as needed, maybe through two or three hot summers and not melt the lube off. I'm sure there is a better way just haven't found it yet.
