Is there such a caliber as this?

338 WM necked down to 7MM?

I'll post this in reloading too.

Yes, I think its called the Remington 7mm magnum.

I figured it was, but I wasn't sure if it was the same case length. My neighbor asked me and I was too lazy to confirm it by going and checking the load books.

Ronnie was telling me that his owner/operator friend just had a custom gun made and he thought it was a 338 necked down to a 7mm.

I asked him if that wasn't a regular old 7 Rem mag. He said he didn't know. I said it sounded suspicious.

I told him I'd post at AR and confirm and wouldn't you know, I got replies in no time.