Catboat, no I have not tried to duplicate the test. I have about 500 boolits left from the original alloy that I've been shooting. I can duplicate the hardness but I didn't write down what the mixture was. I've handloaded my own ammunition for decades but casting boolits is a new game for me so I'm still jumping from gun to gun and just plain having fun.
Right now I'm casting for my S&W 696 in 44-Special and a model 60 in 38-Special. Both guns seem to like BHN 8.0 and HS-6 powder. I'm sure there are better loads that I'll adopt when I find them.
I swore off lead boolits 30 years ago because they turned my 357 into a smoothbore. I lost 30 years of casting experience due to my jumping to conclusions. If we had the internet and this forum around back then I'd be an expert by now.