So as some of you have seen, I am gearing up to cast for a 300 blackout. I have a lee 230 grain mold on the way but I am looking at another light weight mold as well. I see a lot of people recommend an ak style mold for this purpose. I plan to size all my cast bullets to .309. If I get a light weight mold in the 150 grain range, can my sizing dies still do the job if that drop at .312? If those can be sized down with no problem I am sold.