Just want to say thank you for sharing this great info guys. I read lots and post little, the only casting experience I have to date is for pistol. A few posts back Rick mentioned that the quench temperature will have an effect on bhn. From what I know about metallurgy, I agree with him. You should see a difference if the water you drop the boolits into is 33 deg or 200 deg. You should also see a difference quenching with oil vs water. Someday I look forward to trying some of these experiments myself, until then I will gleefully continue reading. Thanks again!