Cam grinder/manufacturer opinions

I bought a used Herbert solid roller for a 383 SBC I put together years ago.
The specs were something like:
275/285-108, .625/.625.

What it measured was:
280/284-106, .615/.615.

I had a customer who bought one new from Doug Herbert for a 440 Mopar.
I dont remember what the issue was that lead to doing this, but I told him how far off mine was from “spec”, so he checked his out.
It was even farther off from the specs than mine...... enough so that we kinda felt like it was ground using the wrong masters.