RE: Arrow spine program help needed
go to archerytalk.com and purchase the pinwheel software. I got it. Its awesome. You can set up your bow any way you want and find out what arrows will work. It will also tell what brands and weight of arrows are recommended for your bow set up. it has a graph that will show if your weak or stiff w/ your current combo. (bow/arrows) for $20.00 you cant beat it!! good luck!!!