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What I got is a Mathews Dernalin I am shooting 63 pounds. I have a 7.3 Gpi arrow @ 28 inches long. (spine 500)
63 x 5 = 315 grains
7.3 x 28= 208 grains + 100 grain point= 308 + 20 grains on insert and blazer vanes= total arrow weight "328 grains"

Will that arrow be a good flat shooting target arrow?

Easton ion is the brand name.
 
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