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ORIGINAL: bigcountry
I made a spine tester out of a dial indicator and wood. I did this for traditional cedar arrows, but works equally well with carbons. It has a 2lb wieght and I generally measure at 26" (traditional convention), but one can easily change it to AMO by moving to 28" and different wieght. But my main purpose is to measure spine variations.
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I'm in the bunch here with what has been said. For shooting beyond 25 or so yards a perfectly tuned arrow is a must!
Prior to doing all of the above I even weigh my vanes to get to get them all balanced.
Spine testing is so critical. I find the lowest reading for spinedeflection on my shaft and align the nock groove in line.
Matching spines is very improtant for me. It make the difference.
Debating with guys at the range/shop etc, the first thing that is mentioned is that this is not needed for 'HUNTING SHAFTS'...for 3D they say yes..but hunting no.
Well I'm a bit puzzled with this. 3D you're shooting at a target for 'points', hunting you're shooting the real thing, an animal that should be killed with one shot and not shot with an untuned arrow, causing a bad shotand then take hours to die some 400- 500 or whatever yards away, if they do at all die.
I really cannot understand how 'some'archers would choose the tune a shaft for 3D, but will ignore that detail for the real thing!!! This blows my mind.
The ARROW is the object that hits the target, not the bow, not the clothing, not the fancy boots, not the scentLok...why not put the same effort into the arrow? SometimesI just don't get the theory of some!
Before my shafts are fitted into my hunting quiver, they're spin tested, spine tested, matched within 2 grains in weight, cleaned and then locked in place. One thing less to worry about.