So I have a Thompson Center .50 caliber Hawkin. Recently, I got a Lee Minie ball mould for it to see how well that will shoot in it. If left as they come out of the mould, it won't slide easily down the barrel like minie balls do in my '53 Enfield. I will be running them through my Lubrisizer but I need to know what size die I should go with. I'm thinking something that will size them down far enough that they will go down the bore fairly easy but not so small that when fired the shirt won't expand far enough to grip the rifling. Any suggestions?