Pappy,
I agree with Planter. At 20 yards you should be destroying arrows. At 40 yards my setup is capable of putting broadheads in the same hole, from a rest.
Pydpiper posted a picture in the thread below about plastic washers that is worth a look. Where are you located??
Bob
http://www.excaliburcrossbow.com/phpBB2/viewtopic.php?t=20096