Usually they are pretty quiet, but there is always some kind of noise. Check out your fletchings. The new limb saver fletchings are supposed to eliminate fletching noise. Maybe give this a try?
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Reflex Buckskin 63#/283 fps
29" draw
gold tip xt
SIMS Vibration Lab Products
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I'm shooting the G5's this season as well ,I've had no noise at all ,but I also would suggest checking your fletching's that have come a little unglued on the front . I noticed a whistle shooting my fieldpoint's and found a fletching like this once I reglued it ,it was gone.