I don't like an absolute straight flying shaft when bare tuning...I'll take a slightly weak(even more than slight sometimes), slightly nock high shaft...put feathers on them and they'll be just right.
Plus I think that when hunting most shots are taken at awkward positions, and stiff after being still for a long time, or maybe the "first shot of the day" in the morning(again,not warmed up)).....so the tendency is to short draw just a bit,so a slightly weak bare shaft will work better for you there too.....
I find if I get a bare shaft too perfect, when fletched it goes the other way, too stiff....
Slightly weak is more forgiving than slightly stiff...
So yeah, try a little more point weight and see what happens...