I designed and had my dad draw up a 9.3-285gr. boolit on auto-cad so tom will have all that info, but I use 3.5%SB-3.5%SN-.4-.5%CU-92.5%PB. I know copper grows, but I don't think it grows too much at the low levels I am using, in fact it could be .3%CU, I was going by weight when I alloyed it and haven't had it tested, but .4% is a very safe bet. what should I tell tom? I mean I was going to get it at .367+.002-0 so I will probably have to size it down anyways. how much would that amount of copper cause a boolit to grow anyways? thanks a lot-Travis