Ditto on getting some new shafts. I do not own any 23 year old arrows but would be willing to wager that they may be unsafe.

Arthur?

(Sorry, could not resist the age crack....)

As c903 was making mention to above any shafts spine will be largely determined by the length of the shaft as well as the draw weight, point weight and draw length that they are being shot at. A 29 inch 2216 shot out of a 60 lb bow with a 100 grain point while using a 29 inch draw length will not have the same spine characteristics as a 27 inch 2216 shot out of a 50 lb bow with a 125 grain point while using a 27 inch draw length.