esshup,
Thanks for pointing out your actual "chain test" results.
I was going to try the full chisel because my CS400 will lag in the cuts for a large, hardwood tree. It is only an 18" bar, but I don't cut enough giants to justify a big saw.
I do cut as high as I can to avoid buried barbed wire and some sand in the bark. (I do have a lot of sandy soil.)