Hi onemoreshot,
don`t know if this will be helpful, but it might give you some ideas.
This video shows some arrows being shot from heavy bows.
Starting up with proper matched arrows, going down with the spine until reaching the limit!!!
http://www.youtube.com/watch?v=WzWrcpzuAp8&feature=channel As stated above: It depends on a lot of things ......
How strong is your bow-
Brace height-
Split or three under-
Arrow weight and spine-
Weight in front of arrow-
Cut to center-
How smooth is your release ......... and so on ....
Anyway, as for me, I gave up about paper tuning my trad bows.
I do as Ragnarok Forge stated above.
Happy shooting
Daniel