My typical setup is a GT3555 with 100 grain brass insert and 125 grain point or broadhead, giveing a total of 225 up front.
I have been playing around with a standard insert (10 grains) and a 200-225 field point.
It seems like the arrow with the standard insert does not fly as good as the others, weight up front is almost identical, so what I am thinking is the brass insert is longer and goes in the shaft farther which stiffens the arrow a lil more. Also with the brass insert all the weight is not on the very tip of the arrow.
Anyone experimented with this?