Hello from mid Michigan. I am attempting to get started casting for my grandad's 1953 Marlin 336 30-30 (ballard rifling). I slugged the barrel and seemed to be .308. I ordered a lee 309-170-f mold and picked up a small cast iron hide glue pot at a rummage sale for $5 half full of lead and plan to just use the inside part and a propane cook top to start. Local tire shop gave me half a bucket of wheel weights for free, probably 1/3 were zinc or steel, the majority were lead (checked each one with a magnet, drop test, looking at markings and also wire cutter test since I wanted to be certain I removed all non-lead ones). I also have a quantity of lead fishing "bank" sinkers (maybe 50lbs.) I have picked up over the years and a stack of ingots the tire shop owner sold me cheap that he had sitting around to cast as fishing lures someday. Also got a random ingot at a rummage sale for $0.50.
My question is, should I melt/mix all the lead I have together to get a decent mix since I have no idea what the sinkers or ingots are as far as composition/hardness? The wheel weights actually seemed to be of varying hardness as well, some were much softer than others. I plan to flux with olive oil and sawdust since I have both onhand.