303Guy
05-31-2009, 04:38 PM
Have any of you Folks found boolit hardness to vary without any heat treatment?
Take a look at this -
The recovered boolit (notice the intact knurling)
http://i388.photobucket.com/albums/oo327/303Guy/MVC-010F.jpg
The as cast boolit
http://i388.photobucket.com/albums/oo327/303Guy/MVC-745F.jpg
The mold
http://i388.photobucket.com/albums/oo327/303Guy/MVC-888F.jpg
This mold was designed to cool quicker at the base so as to prevent shrinkage flaws. It does that alright, but it also produces a softer nose section!
The lead and mold are hot when casting. I do not know whether this particular boolit was left in the mold until cold or taken out as soon as it was firm enough. (My usual modus operandi).
Take a look at this -
The recovered boolit (notice the intact knurling)
http://i388.photobucket.com/albums/oo327/303Guy/MVC-010F.jpg
The as cast boolit
http://i388.photobucket.com/albums/oo327/303Guy/MVC-745F.jpg
The mold
http://i388.photobucket.com/albums/oo327/303Guy/MVC-888F.jpg
This mold was designed to cool quicker at the base so as to prevent shrinkage flaws. It does that alright, but it also produces a softer nose section!
The lead and mold are hot when casting. I do not know whether this particular boolit was left in the mold until cold or taken out as soon as it was firm enough. (My usual modus operandi).