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How light of an arrow with field points can i shoot with a 28 inch draw shooting any where from 65-70 pounds .... right now im shooting 400 grain arrows with 100 grain field points and wanna get something lighter to gain a little bit more FPS
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How light of an arrow with field points can i shoot with a 28 inch draw shooting any where from 65-70 pounds .... right now im shooting 400 grain arrows with 100 grain field points and wanna get something lighter to gain a little bit more FPS
325-350 grains. 5 grains of arrow weight for every pound of draw weight. Arrow length has nothing to do with grains. Length is for figuring spine.

65# x 5 grains = 325 grains
70# x 5 grains = 350 grains
 

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Arrow length has a little bit to do with arrow weight - at 9 grains per inch, a 2" shorter arrow is 18 grains lighter.
 
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