Word search for special characters

I’m trying to make a few simple Find & Replace scripts but they don’t seem to work to well. I need to search for bullets (option-8) and it only seems to work sometimes strangely. The script I’m using is:

tell application "Microsoft Word"
   set findRange to find object of selection
   tell findRange
       execute find find text "●^t" replace with "" replace replace all
       execute find find text "● " replace with "" replace replace all
   end tell
end tell

Is there some ascii code or something for bullets? Thanks in advance for your help,
~peter