Going back to what started this...
"another question, 40 yards max, "due to noise" isn't it loss of kinetic energy and poor trajectory due to the physics of the crossbow and the short heavy bolt it shoots!"
What is your definition of a "poor trajectory"?......then I can reply with more accuracy. Also, what are the "the physics of the crossbow" that you refer to? Because of your own words "as what I know about xbows is limited!" I have to question the source of such tidbits. Just trying to get on the same page you are on.

Todd