I've heard about using abrasives to open up a mould a bit to make it drop a couple/few thousandths larger. What about taking it up a caliber? Say suitable for a 10mm to being suitable for a .41 magnum?
I've got a Lee custom mold that's a 10mm 225gr SWC that drops IIRC at .4025 using WW+2. I've come to terms listing my 10mm commander for sale and all my associated stuff, but this is the last hold out I haven't listed. It's an OK bullet in the 10mm. Bit long and OAL needs to be 1.275 and chamber properly throated to fit, but it's fun to shoot.
I'm wondering if it's possible to open up (by reasonable means) the dimensions to add about .010" to the diameter. Thinking of casting a couple bullets, adding some abrasive compound to it and spin them in the cavities for a while and slowly open it up that way. Growing that much will take some time. Try a compound and open it up that much, clean, cast some more, apply abrasive compound to those, rinse/repeat. Yes anything is possible with time and money. As many of you know I'm fairly young but have two kids and am in the "working poor" class.
As an alternative, does anyone know of someone that can work some mold voodoo on such a mold to help me out? Basically keep the same ratios, but "blow" it up to suit a .41 Magnum bullet to drop a WW+2 alloy at .4130".