Reed
Active Member
I've read his discussion in NRA's Cast Bullets. It's interesting to me that his results show with a temperature of 446 or above, there was no gain in hardness with heat times beyond a 1/2 hour. Of course he controlled his conditions far better than the guy in the video, who had no idea how much heat he was using. Marshall's test alloy contained 5% antimony, 0.5% tin, and 0.17% arsenic. It's anyone's guess what a given batch of WW might contain. That probably explains why I've seen so many recommendations to heat for an hour.Hasn't anyone read Dennis Marshall's articles on heat treatment in the NRA's "Cast Bullets," Lyman's "Cast Bullet Handbk., 3rd. Ed.," and or RCBS' "Cast Bullets, Vol. I"?