HB

Most Easton and Beman shafts are rated by deflection..this is the number you see us referring to...340 spine, 400 spine, etc....This is the amount the shaft bends (deflects) when the arrow is put in a spine tester and a certain amount of weight is suspended from the middle of the shaft..it bends .340" or .400" or .460" or .500" , etc etc..The ACC's have the spine value listed on the shaft and in the catalog in addition to the #-## code that is used normally to distinguish between them. The Beman shafts are simply coded with the appx spine value..400, 500, 340, 300, etc...even the pultruded shafts...380, 360, etc..

What makes it confusing is that all the other arrow maufacturers do their own thing...Gametracker & PSE uses 100,,200,,300, etc, Goldtip uses draw weight (55/70, 75/95, etc) , Blackhawk uses 3000, 4000, 5000 etc) basically a number code that has nothing to do with spine values other than to differentiate them from a differnt value....

PSE lists deflection values for their shafts as does Goldtip...BlackHawk has a "conversion" chart on their website, but CX does not...through some spine testing I've been able to get some average values for the 200's and 300's...which are very close to the PSE shafts...

Hope that helps

Jeff