8ca,8ab & 8bu

[A couple of bucks]

8ca is 42.8
8ab is 41.0
8bu is what

They're all the exact same profile.

 

[blevis213]

48.7 is 8bu-00
45.41 8bu-10

 

[A couple of bucks]

I wonder why they aren't on the clutching chart with the others.