I'm a new to bowhunting and need some help. I bought a used 02 Patriot withmax draw weight of 60# set at 29" draw length with 80% letoff. I am shooting 400gr arrows with 100gr field tips. I have string 2 leeches,rubberband peep, and vibrablocks. What would my estimated speed be? If I decrease the letoff say to 65%, will this increase my speed? Any help is appreciated.