So i have a bowtech invasion cpx with a 29" draw and was set at 57 lbs and a 375 grain arrow. I wanted to speed it up a bit so i was gonna put two turns in the limbs, but turns out it maxed out at 1 1/4 turns. When i shot with the bow at 60-61 lbs my 20 and 30 yard pins didnt even move. Why is this and how much more fps do you think i gained cause im thinking of shooting a 125 grain tip now.
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Originally posted by Raypo View PostYour not going to gain that much speed with maxing it, and your in the sweet spot now. 125 grain tip would give you more KE and more front arrow wieght which will imporve your penetration. Your shooting plenty fast now probably close to 300 FPS...
Rocky n Ray gotcha fixed up bro!
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Originally posted by Bear95 View PostSo i have a bowtech invasion cpx with a 29" draw and was set at 57 lbs and a 375 grain arrow. I wanted to speed it up a bit so i was gonna put two turns in the limbs, but turns out it maxed out at 1 1/4 turns. When i shot with the bow at 60-61 lbs my 20 and 30 yard pins didnt even move. Why is this and how much more fps do you think i gained cause im thinking of shooting a 125 grain tip now.
Going from 100gr to 125gr heads is usually a good idea. But, keep this in mind, when you are dealing with an arrow as light as yours. Bumping a 375gr arrow to 400grs by adding 25grs more head weight will make a bigger change in your arrow spine. Than if you are dealing with a 400gr arrow going to 425gr. You may actually have to turn the weight back down some after going to the heavier head.
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