Too stiff?
 

When I changed EVERYTHING in my set-up last year, I also made the switch to carbons-- leaving me with several dozen straight aluminum arrows that have been collecting dust ever since. (I discovered my draw length was a couple inches longer than it should have been.)

I'm shooting a "03 Hoyt Razortec at 27" and 70lbs. I have a bunch of 2315's and more than a few 2512's and 2514's that could easily be cut down if it's worth the trouble. I also have close to a dozen 2016's from my son's bow which he doesn't use. These are all XX75's. The charts don't include them in the best choices, but is there any use for them other than a tomato stake?

RE: Too stiff?
 

Dave, I ran your setup on TAP and found the following
2512 28" shaft 4" vanes 100gn tip
2315 28" shaft 4" vanes 100gn tip
2514 29" shaft 4" vanes 100gn tip
should all spine out ok.:)