The hydraulic control checks are not intended to be checking for response across the full range of normal control inputs. You are simply checking for a correct response, that is, the disc tilts in the right direction to inputs, and no unusual feedback forces or binding in controls. A jammed servo/pilot valve or other hydraulic problems should be self evident with only minimal control inputs. Don't risk exacerbating any problems by making your control check movements outside the range specified in the RFM!!
I'm waiting for Nick Lappos to jump in here, I recall he's posted several very informative responses on this topic several times previously.