I read in Rifle Magazine, - about 1979 - that the 25-06 was marginal for caribou.
Funny- in the previous 3 years I had had 20-something one-shot bang-flops on caribou, out of Pt Hope. Ruger 77V.
Haven't read a Rifle magazine since, or pretty much any other such rag. Yeah- I know- not the publication's fault - it was on the author, whoever that was.
By Burn's definition (one of them), the 7X57 is obsolete too, because I haven't been able to find factory ammo for mine.