I'm trying to decide if I need to build heavier arrows for hunting Elk and Mule Deer. My current arrows are 370 grains with 100 grain broad heads. The bow is set around 65lbs and shoots those arrows at 312 fps. According to the Eastman calculator, that equates to 80 ft/lbs. is this plenty of KE for Elk or do I need to build new, heavier arrows? Thanks in adv.

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