New Primed 375 H&H Brass

[Bush Buck]

I see that Raven Rocks is offering new 375 brass with Barnes head stamp and RWS primers.
Has anyone tried this brass?
Is it ready to reload or does it require prep? How do you prep brass that is already primed?
Has anyone been able to tell the difference between this primer and the ones they were previously using?

Thanks,
Bush Buck