I have a long draw and am currently shooting 31 inch MFX classics out of my 62 pound longbow. They are the original aluminum inserts. I need to go to a 32 inch arrow due to a form change and the new arrows have the brass insert. Think I wikk need to go up to a 340? By the way my 400's bare shoot perfect now. Thanks. BILL
I would pick a 340,they are long enough and the stiffest of the Classic MFX.I think they are 32.5" and you are shooting a bow heavy enough to handle them.