I'm a low volume caster and shooter. I shoot maybe 80 rounds a week and rarely cast much more than I need for a couple weeks of shooting.
I just this week started playing with heat treating.
First attempt was to see if I could heat treat 50/50 Lyman#2/lead. 95/2.5/2.5
460 degrees for 1 hour in convection oven. Within 3 days they were over 22 bhn using the pencil test. Got a result!
Now here is where my question comes in. I tried a different alloy 2 days ago. This one is roughly 91.75/4.75 tin/3.25 ant/0.25 As. 420 degrees for 1 hour.
I've gotten MAYBE 1 point of hardening so far. I understand that it takes time but figured I'd ask to see if that was normal. I don't want to go much higher in temp because I'm only shooting for around 18-19 bhn. Started around 13 and might be 14 right now. Hoping to be at 18 by Friday when I test my good loads with the harder alloy.
Normal?