I always thought shorter arrows would not shoot as well an just had that fact in my mind.then after some testing in my bows found I was wrong at hunting ranges.i used the same setup with brass inserts an blazers an just cut 4 inches off the shaft an that dropped my arrow weight from 416 down to 380 in a 16 inch arrow. I shot them in all our bows an did great . but no broadheads from the equinox as it would need a little longer arrow than 16 inch to let the broadhead set in the riser grove.
in my bows I find most broadheads even exspandables shoot a hair lower an more so with fix blade than field points . an the longer the range the more .but with the 16 inch they hit about the same as my field points out to 50yds in both my bows an not lower like the 20 inch. don,t know why or care but works for me an have been shooting short arrows for awhile an don,t have any 20 inchers made up they have all been cut down
I even have some slugged with 14 inches of a shaft that weigh 515 gr an get the same results with the 16 inch arrows with broadheads.
I have shot arrows as short as 12 inches in my shorty bow an it is deadly acurrate half of the time at thirty yds. but i get flyers the other half using the same arrow?
most times hunting I use a rope stirrup an don,t like arrows sticking out past the front of the bow catching on anything.