Not the normal question, as everyone wants to harden their lead , I understand. I have a great deal of age hardened alloyed lead that is testing at 16-18 BHN and harder. I want to do some testing on a certain caliber based on bullet weight and max pressures. The formulas that I have used suggest I would be needing BHN 12, as being hard enough for the max pressure and soft enough to seal the bore properly and for the speed it will be travelling. I know a ton of people will say , it doesn't matter, that they don't care, as every bullet will go down the bore. According to a good deal of people making video's out there, certain BHNs should be used for certain FPS and there are optimal pressures for bore sealing and max pressures that a BHN can take before issues arise, and I would like to experiment with that in mind. Does anyone have a formula or a tested practice that I can dilute my 10#s of 16-18 and bring it down to 12 ? Again, I know it's not a common question, but it is one I have. Food for thought for some while a total waste to others, again I understand.