I would like to compare these cartridges in terms of penetration (not recoil…); especially comparing their standard weights 286 gr vs 300 gr (if loaded with the same bullet like Nosler for instance)
As I have read that the 9.3 outpenetrates the 375 each time.

I wonder if that is true because the 375 has a long and respected track record.

However I assume it can happen particularly when the 375 is pushed to higher velocities. My friend owns a 375 H&H Flanged single shot rifle and it has always outpenetrated his friend’s 9.3 (both used the Oryx bullet and the bullet velocity at each was around 2300 fs). They used wetpack for testing.

What do you guys think?

CZ