Hi Tim; for bench chisels its a primary of 25* and secondary of 30*. If I were to still experience chipping I would increase the secondary to 32*.
I should add I have nothing against the unicorn methodology. Its an additional approach thats to available From my perspective it has a place with my carving chisels and gouges, but I dont see a reason to move away from using my bench stones for regular chisels and plane irons. Others will differ, but thats the nature of sharpening threads.
regards Stewie;