Looking through the lyman cast boolit book (#5) it calls for many of the boolits to be cast out of these 2 alloys. Now I am aware that this is just there suggestion, but are these alloys really that good?
What I mean is what applications would they have? Isn't lino too hard? Everything I have read on this site says you want something close to 2% tin and antimony for hunting rounds so that you get expansion and they are not brittle.
I have been mixing up some alloys for my 44 mags with the 2% range with slightly higher tin content. This far I have not experienced any leading even with boolits sized to .429.
I would assume you would want the harder lyman #2 for some of the rifle rounds that get cranked up, but isn't that the purpose of a gas check in high speed rifle rounds?
Just trying to figure out why lyman would advocate using such hard alloys. Not to mention the fact that tin and antimony are the more expensive components to these alloys.
Just curious I suppose.
Thanks,
Ken