I will say,, I have noticed over the years,, the heavier arrows are more forgiving of my release,, or flaw in form,, and could calm a finicky bow down to a good shooter,, but thought it was just me ,,, and my lack of good form,,
for example,, I am shooting a shorter 55 inch bow,, with the light arrows,, I get good flight, but if my release is a bit off, ,the shot is quiet a bit off, with 700 grain arrows, I am much more consistent,,
ok I here the comments now that I am giving up trajectory,,, thats true ,, but at close hunting shots I am shooting 15 yards its not an issue,,
for elk I shoot a heaver bow,, and am good to 40 yards,, so not so much of an issue for me with that set up,, point on is 45 yards,,,
I will say I have shot with guys that were so good,, that the light arrows worked great for them,,,accurate and flat shooting,,,but for me the heavy arrows are a bit more stable,,