No, AFAIK, this can only be controlled from the users computer.
Also remember your resolutions...
What looks good for you at 1200x1600 on a 24 inch widesscreen, may not look so great on 19 inch monitor at 1024x786. (or vice versa)
...so why force what looks good to you, on another user...
;-)
Also if you notice, the PDF will dynamically "Re-Zoom"size itself when you resize the window it is in, so this may be harder to control that expected.
FWIW:...here is the basic code to open a PDF to a set resolution from VBA:
Dim varApp As Variant
'Open the PdF at 100% zoom level
varApp = Shell("C:\Program Files\Adobe\Acrobat 6.0\Reader\AcroRd32.exe /A Zoom=100=OpenActions " & "c:\YourFolder\YourPDF.PDF", vbNormalFocus)
;-)
JeffCoachman