Looks like I am going to be acquiring a Marlin 336 in 30-30. I would like to cast boolits for it and powder coat them. I would use this mainly for plinking and maybe deer hunting at some point. What mold would you recommend? My only molds are from Hardline Industries so that is my only experience. I would most likely buy a mold from a custom mold maker, not a Lee. It is supposedly a newer one. Anything I need to know for casting for a microgroove barrel? I would probably not want to push the boolits too fast, so with powder coating do I need a gas check?