i have enough plumber's lead(house water lines, tees...) to do a neighbored. i was wondering, since plumber's lead(almost pure lead) doesn't have any antimony, is it possible to do a 20:1 and coww type if i just use tin? (http://castboolits.gunloads.com/show...oy-calculators) the alloys will be for deer and possibly black bear. my 44 will be used at 50 yards or less and my rifles(45-70, 444 and multiple 30's) will go 150 yards or less.