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I was wondering what kind of speed loss I could expect for every 10gr. of arrow weitght I add. I am wondering because I got some new arrows cut and they are 40gr. heavier than my old ones. They are the same 75/95 gt's and the same length but are heavier for some reason.
 

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probably 10-15 fps
 

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Every 3 grains is roughly 1fps. So you'll be 13-14 fps slower.

Not sure how it's the same arrow cut the same and they are 40gr heavier though. Even if the inserts and nocks weren't the same, that still would be far from 40. So not sure on that one.
 
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