I have a minie mold by Lyman.. 577-611. This round is a thick skirted bullet that comes out of the mold at .575. What powder charge FFFg would you use to expand that skirt? I expect 55 grains should do it but want to hear if anyone out there has experience with this particular bullet. I will be shooting them out of several Parker Hales's with progressive depth rifling if that makes a difference.