Just two further queries .... I cast bullets from a Hensold mould made to a Serrosafe casting of the barrel, chamber and muzzle end. If I used a sizer, would it change the calibre so that it no longer suited my specific barrel? And secondly, if I load the original amount of BP, there´s no space left for lube under the bullet. Even using a bit less powder, the bullet compresses the powder ... or ... the round comes out too long and the breechblock won´t close on the base of the cartridge. Should I use a compression die to get all the powder into the cartridge?