you could reduce point weight, or increase the weight at the nock end with heavier fletchings. An arrow wrap can also serve to stiffen an arrow by about 1/2 a spine.
7fps will make a difference especially if you are right on the border between spines.
There's a similar issue with compound bows. Hard cams are generally classed as a cam that generates over 300fps, but the difference between 300fps and 338fps is fairly significant to your choice of arrow, but most charts won't differentiate between the two, just classing them together as hard cams.
Sorry.....sort of hijacked your thread with a rant
