Yes, you get the same as me. Bics are wonderful blades until the ATG pass, then they get really rough for me. It isn’t due to the razor as I experience the same even with a razor like my Athena which clamps the blade right at the edge. It has to be the blade bevel itself that is chattering.Interesting hypotheses about BICs. Do you have any more info on this?
I love BICs but depending on the razor I feel them a little harsh only on the ATG pass. Since you feel the same, what blades do you prefer for the ATG pass?
I actually had a harsh shave today with the Merkur progress and a BIC. WTG/XTG were smooth as butter, but the ATG was not so comfortable and left me with some burning on the neck.
I know the progress can be a little aggressive for me because of the positive blade exposure even on lower settings but I don’t know if that could be also because of the blade.
I don’t have any manufacturer information on this, but it has come up a few times in Bic threads here that the bevel is ground thinner than most blades. Maybe someone checked under a microscope before but I haven’t seen it. I’m only going on what people have told me, and I can’t think of another explanation for what you and I experience. It’s consistently reported to be one of the sharpest blades available and if it was only the sharpness there should be no issue ATG - in fact it should be smoother than other blades. It’s the only hypothesis I have for this harsh ATG behaviour from such a sharp, comfortable blade.
FWIW, I am very happy with Kai, Personna Lab Blues, and Perma-Sharps. They all work very well for my hair and skin. But I’m not someone who has tried and rated every blade - when I find a good one I tend to stick with it.