I have some 2317's sitting around. Are those way to much for my bow to handle?
My 2317's with a 100 gr. tip weight in at 571 grains.
2016's of the the same length (according to my calculations) would be ~435 grains.
Almost a 140 grain difference.
I would agree with tater, I would shoot bare shaft to see how the arrow flies with the 2016s. 3 Rivers has an arrow spine calculator which will get you in the ball park for arrow spine.
I have a couple 50lb bows - a Southwest Spyder and a DamonHowatt hiSpeed. Both like these combos:
2219s at 29.5" with 225grain broadheads
2117s at 29" with 175 grain broadheads
The 2291s go about 675 grains total and the 2217s are like 615 I think.
My guess is a 2018 with a 125gr point/standard insert will be close (assuming 28" draw and ~29" arrow length).
Bare shaft tuning will tell you a lot about spine, nock point, and your release!