Ok, so at the shop, when i bought my bow, I just grabbed the most reasonably priced arrows that were about the weight i wanted. At that point in time i had no idea that spine affected arrow flight. I still dont know how to tell what spine is good for me. How do you find out what spine size you want and what does it do for you? What will it effect if you have more or less spine?

I am shooting a Martin Bengal
25" @ 60 lbs
No idea speedwise...........around 250 fps i think.

I am shooting Beman Ventures 400's.
I think they are 8.4 gpi


Any info would help!

Thanks