For run of the mill pistol bullets, yes, probably. Cast some ingots and test for hardness and go from there. But, that's like saying "If I had two apples and you gave me two oranges, how many pears would I have?" We would need a helluva lot more info before making a cogent prediction as to the utility of an alloy made up of your odds and ends. Ie: What kind of shot, what are your old casting alloys, did your dad use pure lead for his roundballs or did he use anything he laid his hands on, etc. etc.
Excellent post and spot on!
