RE: bow poundage question
It depends on the spine of the arrow you are shooting
A bow with its limb bolts turned all the way in is no more accurate than a bow with its limb bolts out a couple turns , in fact with them out it will be more accurate if the arrow you are shooting is under spined .
It might be very slightly quieter or it might make no difference at all , it depends on the model , and what type of limb attachment system the manufacture uses , and other variables .