For years, I would spend my hard earned money on high end arrows thinking I was getting a better product. Closer tolerances with weight and straightness coupled with some new marketing terms got my dollar bills every single year.
HOW IS STRAIGHTNESS MEASURED
First off, much like other product categories in the hunting industry, the lack of testing standards is apparent. ASTM/ATA standards say arrow straightness should be measured along the full length of the shaft minus 2". From my research, some companies will advertise the arrow straightness not throughout the shaft but only the difference between the starting and stopping points (that is obviously amplified for illustration). For example, if the arrow shaft had 1" deflection throughout the shaft but the starting and stopping points of the measurement were within +/- .003" then the straightness tolerance we be labeled as +/- .003". Other companies follow a much more accurate and honest procedure. So if you have a future arrow shaft purchase in mind ask questions!!
ILLUSION OF CHOICE
One of the biggest eye openers for me was that, in many cases, carbon arrow shafts regardless of tolerances are EXACTLY the same. Made from the same materials. Made with the same standards. Made with the same construction process. After production runs are completed, arrow shafts are then sorted and grouped together by "straightness" and marketed accordingly. In many cases, the sorting process gives manufactures the opportunity to have multiple sku's of carbon arrow shafts with different straightness tolerances without actually having different arrows!
As the marketing team does their job, prices points are set from the top down, with the straightest arrows being most expensive and marketed to more experienced shooters and the +/- .006" shafts being cheapest and marketed to newbies or price point purchasers.
WHY STRAIGHTNESS DOES NOT MATTER IN CARBON SHAFTS
From a physics standpoint or lab setting, straightness does matter to some extent...take long range shooting, bring in a shooting machine, and then repetitively shoot arrows ranging in straightness from +/- .001 to +/- .006. The straighter arrows will absolutely group better. BUT YOU ARE NOT A HOOTER SHOOTER! On top of the idea of human shooting flaws, the difference in grouping between arrows is relatively minimal. So keep yourself, the shooter, in perspective. In reality, there's only a few archers in the world that are skilled and consistent enough to see the benefit from shooting a "near perfect" +/- .001" arrow over a "average" +/- .003" arrow.
Straightness in carbon shafts is more about selling arrows than increasing accuracy. The actual difference between +/- .001 and +/- .006 shafts is literally hairs.
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