Someone educate me on the different 338 caliber rifles

[KnotRight]

How many different 338 calibier rifles are out there? Not makes but different rounds. What is the low end to the max rounds.
This is a caliber I have no experiance with the 338.

 

[JimP42]

https://en.wikipedia.org/wiki/List_of_rifle_cartridges#.30_caliber_–_.39_caliber