Sage Creek Gus SASS #64320 Posted March 22, 2012 Share Posted March 22, 2012 I'm sure someone here can answer this question. I've been all over the internet on this but haven't been able to find the answer. I have about 100 pounds of pure lead and want to cast some 20-1 bullets for my Sharps 45-70. I'm trying to determine if when a lead/tin alloy is rated as 20/1 if that is by weight or volume. I have an ingot of lead/tin I got from a building supply house which is rated 50/50 lead/tin but even they can't tell me if that measurement is by weight or volume. I'm trying to determine how much of my pure lead to mix with this ingot of lead/tin to get a 20/1 bullet alloy. Anyone out there help me? Sage Creek Gus Link to comment Share on other sites More sharing options...
Chickasaw Bill SASS #70001 Posted March 22, 2012 Share Posted March 22, 2012 That 1 is pretty easy 100 lbs of PURE lead , and 10 lbs of 50/50 CB Link to comment Share on other sites More sharing options...
Garrison Joe, SASS #60708 Posted March 22, 2012 Share Posted March 22, 2012 Metal alloys are mixed by weight. (Volumes of chunks of metals are REAL hard to measure.) Your solder from the building supply is 50% (by weight) tin. If you have pure lead, it is 0% tin. You want an alloy of 20/1, which is 4.8% tin. Basically, you want, for every 10 pounds of your soft lead, to add 1 pound of 50/50 solder. That will give you 11 pounds of alloy, with 0.5 pounds of tin in it. About 4.5% tin. Close enough. Good luck, GJ Link to comment Share on other sites More sharing options...
John Boy Posted March 23, 2012 Share Posted March 23, 2012 I've been all over the internet on this but haven't been able to find the answer.Gus, here's a web site you can spend hours reading, including cast bullet alloys. Put it in your computer references ... http://www.lasc.us/ ... The Los Angeles Silhouette Club Link to comment Share on other sites More sharing options...
Ol Number4 Posted March 23, 2012 Share Posted March 23, 2012 Good answers above, use the weight to measure your alloy formula Ol' #4 Link to comment Share on other sites More sharing options...
Sage Creek Gus SASS #64320 Posted March 23, 2012 Author Share Posted March 23, 2012 Thanks fellows Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.