Recently was given an almost full caddy of Alliant Herco powder. I am thinking of loading some reduced load cast boolits for my 09' Argentine with 175 gr. lead boolits. Seems hard to find data for this powder? Anybody got any great ideas? Am down to about half a pound of RL7 which is my go-to powder, so wanted to work with something new until RL7 becomes available once again................