I was getting minor leading when shooting PB cast bullets in my 327 federal. The alloy was unknown, but relatively soft, around BHN 10-11. I tried lighter loads, and I had to go to very low pressures to stop it. I decided the alloy was just not up to the 40k+ psi loads. I cast and water dropped from the mold Lyman #2, except I couldn't get the last bit of Linotype in the pot. It turns out a Lee 20 pound pot is more like a 15 pound pot. The alloy ended up closer to 90/5/4 lead-tin-antimony. I air dropped some 30 cal bullets with it, and they come out 14-15 BHN, as I expected. The 32 cal bullets that I water dropped seem to be 25-27 BHN . That's not a bad thing, but I expected 18 maybe 20. I repeated the tests 2 more times on different bullets and got the same result. This was measured with the Lee hardness tester. Has anyone else gotten results like I did? I was casting in single digit temps, the water was probably just above freezing.