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[quote=596239]Is it always the same three arrows hitting in random locations?[/quote] Good question ... often it is the arrows, not the bow that need to be corrected. First, number the arrows. Second, shoot each arrow through paper at 5'. Don't make any changes to the bow, yet. All arrows should have the identical paper tear. Any that are different from the majority, should have the nocks turned until they produce the same tear as the others. If they won't produce the same tear, they are 'lemons', and should be set aside for stump shooting and varmits, etc., and especially not used for broadheads. Next, with all arrows checked out and only using the 'good' ones, do a walkback tune to verify centershot setting, but first make sure you set the sight bubble to be level when the bow is plumb. Finally, shoot at 30 or 40 yds using a fresh target. Put an X over the hole of any bad shot you know was your fault, only observe the pattern of holes you felt were good shots. If the pattern is taller than wide, then move the nock height down about 1/32" or the rest up 1/32". Shoot another fresh target, about 24 shots should be enough (2 of each arrow), and continue to make adjustments until the group is circular. If at any time the pattern is wider than tall, raise the nock height or lower the rest slightly. Now you have both the bow tuned and the arrows checked out. From here on pay attention to the outlier arrows, the ones that aren't in the group with the others. If there are a few that most often are outliers, then it is probably a spine issue ... usually they are weaker than the others, and less forgiving. Despite what specs arrow manufacturers advertise, spine consistency and 360º uniformity commonly are not that good, especially with all carbon shafts. A homemade spine tester takes a day in the shop and under $50 to make. It is invaluable for sorting and building arrows.
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