how much will a a few grains REALLY matter in real life typical 40yd or less hunting range though?? im new to archery so i dont know...maybe it does make a huge diffrence...maybe you guys are being a bit finicky! lol....i know mannnnnny reloaders do it and even muzzleloader shooters that do weigh stuff also....when the matter of hairs of an inch matter id say go for it....but for the average hunter will it make a huge diffrence??
Most of us would never know the difference in p.o.i.
It would be tough to know where to exactly draw the line for the average shooter. There are so many other variables that affect arrow flight (grip, the release, stance, wind, etc.) I dare say that if one shot an arrow on the stiff side of the spine chart, the averagehunter would have a hard time telling the difference between a 100 grain head and a 125 grain head.