Quote Originally Posted by Richard View Post
It split during the pinning. I think the pin hole and material are the same. I'm using 1/16" brass rods and drilled the hole with the same size bit.

Rich
"There is no native criminal class except Congress,"- Mark Twain
Try lighter taps on the pinning and using less pin stock. The less you have to pin out, the less there is to compress into the scale hole and put the pressure which splits it.