It comes down to penetration.A stiff arrow,even carbon will have to recover from the spine being to stiff.This will eat up forward momentum and ke.You can tune a bow to a stiff arrow but the tune will not be the most forgiving.What I mean by this is sometimes the centershot has to be out for a stiff arrow to shoot paper or the nock heighth has to be way out of wack.A stiff arrow will do great as far as grouping but will usually have a kick when tuned to group.This is where penetration suffers.Going a little stiff is fine but don't get carried away.Just my opinion.


I would worry more about spine consistancy than straightness.I have shot really well with Redlines at only .004 straightness.


There are some heavy arrows that will spine and get the weight you want.AC Kinetic II are aluminum,carbon mix but are quite heavy.The Nitro Stinger golds are 8.9 gr per inch.They spine from 60-100# and that is due to the tapered design.These arrows will flat out penetrate a live animal.They are also VERY accurate.I think it would be much easier to just get the right arrow and shoot it.