Apologies if this has been discussed, point me in the right direction please. I'm not technically looking for load data, because I think volumes have been written on lead over black powder. However, is there anything I need to pay extra attention to seating a HBWC over black or subs? Should I compress the charge more than a flat base boolit? Add a wad or card? Don't want any surprises from empty space in the case.
Thank you kindly.