Olink,

From target archery I can tell you that as little as 3 grains or so can make over an inch difference of impact height at 60yds. When building arrows I always weigh components and adjust them to make my arrows match up within a half grain. I was building up some aluminum arrows for my recurve not too long ago and its amazing how inconsistant parts can be. I found anywhere 5-7 grain variances in inserts. Tip weights vary 5-6 grains at times. Even nock adaptors vary in weight. Aluminum shafts often vary several grains within a dozen. Its a tedious task to sort all the components to try mateup the best combinations before removing metal to bring the weights in. For the most part I use all glue on components like nibbs, field points, and broadheads. The consistancy seems to better in the manufacture. It is possible to have arrows that have 10 grains or more difference from others within a dozen if just assemble your arrows without balancing things out. At short ranges like 20 yds most archers would hardly tell the difference. Stretch the distances out and the story changes. Once I get my broadheads weighted and tuned they remain broadhead arrows only and stored as such for the next use. Its too much of a hassle to go through season to season tuning them.