Originally Posted by USSR1991
Why on earth would anyone need to heat treat linotype with a BHN of 22? But again, arsenic is not necessary for heat treatment.

Don

Do Berry's have a BHN of 22?

Well, my results are in:
I waited about 4 hours and then took a small sharp tip Philips head screwdriver and put all my weight on it for 5 seconds and here's the results.

[Linked Image]

The one on the right went pretty deep and the one on the left barely got past the copper plating. It definitely quench hardened. How much more, I don't know but I am sure it hardened.

There are many reasons why one may want a softer bullet or a harder bullet. My purpose for hardening is to get better penetration. I'll have to drop my 10mm load back down though and work back up with the heat treated bullets.

I was getting pretty good accuracy with the bullets the way they were so I'll have to see if I get the same velocity and accuracy with them heat treated.