Reddit reviews 50% Tin, 50% Lead Solder Bar Made in USA by RotoMetals
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50% Tin and 50% Lead Bar SolderMeasures approximately 13.5" x .75" x .25"Averages .8-1.2 lbs.Approx Melting temperature 361-460 FHand Poured in USA!
Ok, wheel weight spray has some ton and antimony in it. Find a welding supply shop and get a 50/50 stick of lead/tin. Mix 9lb wheel weight with the 1 lb stick and you'll get a pretty solid approximation of a classic bullet alloy.
I'll try to find my source.
Edit: Here's where I got this info years ago. Right column, second from bottom. It's close to Lyman #2 alloy. Also, you can get the bars from Amazon now which wasn't an option when I found this.
Edit 2: /u/cornmastah can give you specific info about casting for .45-70 as he does a bunch.