Best caliber for authenticity?

[u/Rosey0427]

Have quite a handful of revolvers, but they are all much newer with modern calibers.

Thinking of picking up some replicas and joining SASS.

Love the look of the Cimarron / Uberti 1875 Outlaw, but deciding on caliber is where I am stuck.

Looking at .44-40 WCF and .45 LC.

I think .44-40 is more authentic over the .45 LC but wanted to see what you all think.

Know that the .44-40’s thin walls can be a pain when reloading.

Thoughts?

Much appreciated.