Hmmmm, I was looking at the carmel glass color and general construction more than anything. My arrows are target arrows, 35# spine (measured) and .308" average thickness with 3 1/4" long fletching. The wooden insert averages .265" diameter. The model is #105. I'd imagine that they would have several models including hunting models with larger fletching to stabilize a broadhead.
The rear tapering of a fiberglass shaft is a bad idea and I wonder if they moved away from it for durability?
I'm curious if your nock insert is not at the proper depth to allow the nock to fit flush?
Can you measure the diameter of the insert or diameter of the shaft outer and inner?
Being 45# spine they should be a bit thicker.
Do you think that the color and construction are more telling than a variable like crest and fletch shape? :confused: