RE: Correct spine
MilDotMaster , The thin wall aluminum shafts do have some durability issues , will bend , but I have not had issues , with 13-14-15 mill walll shafts .I know they will bend , but if you treat them with alittel care that is not a big problem . With carbons they break , I have seen several break after being shot thru animals , and a few blow up on release from the bow .
The point I was trying to make is as far as accuracy goes , I never have had a problem with a dozen new aluminum shafts hitting the same or very close to each other , but with carbons , I have seen some horible groups from new set's of arrows , and allso had some that shot fare at first , and then the groups opened up after time , due to what I believe is the spine weakening . With alluminum shafts that has not happened to me , never shot the spine out of an alluminum arrow , and very few have bent on me . They will be slower , as they are heaveyer , but their accuracy is far superior , "In My Experiance ".