My alloy recipe is very simple. Straight wheel weights. I get a 5 gallon bucket chock full for 30.00. Usually yields about 75 lbs. of material.
Lube for these is the 45/45/10. Lee liquid alox, Johnson's wax, and mineral spirits.
As these are plinking and informal target loads. this combo works out great. They shoot well at 7-800 fps, and are fairly inexpensive. Plus, I just enjoy doing it.