Trying to find some 70-75# 5/16 shafts. They probable would have to be compressed to get that spined. Who has any?
Buy yourself a compression block from 3rivers, that is how I get mine. You loose about 3# spine in the process.
Might try www.worldclassbows.com (http://www.worldclassbows.com) I like their shafts.
Snag,
I don't think Cedarsmith compresses anything to 5/16ths, 11/32nds is the smallest unless something has changed.
Tater