That depends on how many grains of arrow weight you drop in the change from alumimum to carbons. Usually you get 1 fps for every 4-5 grains of arrow weight that you drop. So if you drop 100 grains you will pickup about 20-25 fps.
This is true. It all depends. You can gain a lot of speed staying with aluminums. You have to shoot the thin wall ones (.012). But the best is to switch to carbons. Yep, 1 fps per 5 gr loss in weight is about right.
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carbon arrow speed
