I'll take your word for it.

I had a friend who bought a Kreighoff at SCI a two barrel set one in 458WM and the other 375 H&H. He decieded to sell it and the buyer rebored the 458 to 450#2 but could do nothing with the 375.

He broke the little clip off of the ejector after a couple of boxes of ammo. He is now considering a rebore and rechamber to 400 Jeffe. I think that if you have to have a rimless cartridge you should not have ejectors but extractors.

Interesting enough the 450#2 shot better after it was rechambered than before as a 458.