To answer your first question: Absolutely not. Among ALL carbon shafts they are some of the most consistent for spine and weight...I generally have to trim from either end to get straightness "decent" and that doesn't always help..even at my rather short 27.75 to 28" arrow length. IME, A/C/Cs are worth every penny, but in the all carbons the Easton C2 shafts and Beman ICSH/camo ICSH are decent hunting shafts if care is taken with them from the get-go.

My tips for buying/using all-carbon arrows would be

1) buy raw shafts only and in dozens only. Don't mix and match from different dozens (cause they may mix, but they don't always match)

2) Use an arrow roller (i.e.Apple arrow roller found in most archery catalogs) or straightener to figure out how each shaft needs to be cut for best straightness (cut from one end or both..or use the arrow for a tomato stake)

3) If possible (i.e not too much trouble) beforehand, like IMN23D does, find the high spine side

4) trash the push in nocks and install a uni-bushing and G-nock (w/ epoxy) for greater longevity and safety.

5) Fletch cock feather appropriately according to what you find in step 3, then complete fletching

6) use slow setting epoxy for inserts w/ the broadheads you plan to shoot, turning them until you get concentricity as good as possible

I usually ignore # 5 due to a wife who nags me to no end when "I play with my shafts in the bathtub" and just rotate the nocks If I get a "flyer".

Or you can buy A/C/Cs and ignore #'s 2, possibly #3, #4 and possibly #5. I very rarely have to turn a nock on A/C/C to get them to group tight (at least within my abilities)