If your arrows are on the edge of too stiff spined, then you may have a tuning issue with an extra 15 grains on the back of the arrow. If your setup is already slow then POI will drop off at distance. If it's a fast setup then your groupings at hunting distance will not be noticeable. Another way to keep weight and tuning similar is to run bushings on your normal nocks and none on the lighted nocks.
I have had individual arrows fall short with lighted nocks. On a couple, nock tuning brought them back into the group. On one the nock was almost 8 grains heavier than the rest in the pack and I tossed that one. Another had tighter string tension which caused accuracy issues. It was tossed too.
I have had individual arrows fall short with lighted nocks. On a couple, nock tuning brought them back into the group. On one the nock was almost 8 grains heavier than the rest in the pack and I tossed that one. Another had tighter string tension which caused accuracy issues. It was tossed too.
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