I know you are asking about Victory arrows and I am guessing you know about Carbon Tech arrows since you mention Len but, I have tested some (around 18)CT Whitetail XP's and the spine consistancy was .005 or less. There were a couple that ran out to about .008-.010 but that is still very good. All were straight if you allowed for trimming the ends off and using a shaft length less than 31" or so.

I also tested some CT Cheetah Hunters (11)and they were not quite as consistant overall but still very good.