I had to be careful concerning powder sill when I first got my Co-Ax press. My fat fingers would occasionally bump the case as I was letting go and dump the powder. What I do now is put bullets in the cases while in the loading block then hold onto the case and bullet with my left hand while pulling the handle with the right. When the jaws clamp I let go. Maybe better ways, but that is what I came up with.
As far as the jaw strength goes, a couple months ago I had a case get stuck in the die. While trying to push the handle up the rim of the case sheered off before the jaws failed. They held tight.
