I had two C.E. 150s and two 250s cut to my (not Shaquille O'Neal's) desired length- 29.25". I then had a 50 grain point insert and a 100 grain point insert installed in each. For around $5, 3-Rivers sells a field point test kit with the following points: 2-100 grain, 2-125 grain, 2-145 grain, 2-175 grain, and 2-200 grain, & 2-250 grain points.
Because Widows tend to shoot hard (typically requiring a little extra spine), I had an hunch that a C.E. 250 with a 100 grain insert and a broadhead in the 145-200 grain range would put me in the ball park.
Not surprisingly, a 125 grain point showed stiff, as did a 145 grain point. 175 grain point was still indicating slightly stiff- too stiff anyway to allow for the addition of fletching. A 200 grain point resulted in a slightly weak shaft. As a shaft transforms from being too stiff to too weak, you know you're getting close. After a quick fletching job using my trusty fletch tape, using my 5.5" nanners to viagra things up a bit, I ended up with a perfectly tuned arrow in about an hour.
Shooting 53#s, my 29.25" maxi fletched C.E. 250s require a 100 grain brass insert and a 200 grain field point or broadhead. Using a 75 grain steel broadhead adaptor, this will allow me to choose between various 125 grain broadheads including the Wensel Woodsman, Zwickey Eskimo, Magnus Snuffer or two-blade, etc.,etc. LOTS of options!
Incidently this arrow weighs in at +/- 630 grains- about 11.9 gr/inch without requiring weight tubes, weight adaptors or the blessings of a Shaman warrior.