RE: A deer can duck an....arrow??!!
So now, to answer your original question more accurately:
<BLOCKQUOTE id=quote<font size=1 face='Verdana, Arial, Helvetica' id=quote>quote:<hr height=1 noshade id=quote><font color=red>
How fast does an arrow have to be to fool the reaction time of a whitetail deer in less than 10 yards?</font id=red><hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face='Verdana, Arial, Helvetica' size=2 id=quote>
The sound of a release will get to the deer in .027sec. Deer's raction time is 0.05sec.
0.05 + .027 = .077 sec before reaction takes place at 10yds.
30ft/.077sec = 389.6fps
The deer will hear the noise and not have a nanosecond to react....
At 20 yds you'd best be pushing 600fps...