A STRANGE CUSTOM WINCHESTER MODEL 70 - 50 BME CAL ?

I just bought this but don't have it in hand yet .. anyone know what caliber this is?

Description said ...

CUSTOM BIG BORE WINCHESTER 70 50 BME B.M.E LAMINATE A CUSTOM BIG BORE RIFLE MADE ON WINCHESTER 70 ACTION. THIS IS CHAMBERED IN 50 B.M.E. WITH LAMINATE STOCK.

https://images.gunsinternation...E4BE6FC318586BE.jpeg

https://images.gunsinternation...314FFCD2DF71E0F.jpeg

Good evening, All,
My buddy and i.just had a hunt in NZ not work out. Long story, but we decided that we would still push on to the Southern island. Does anyone know of reputable fishing charters or day trips for fly fishing out of Christchurch? If you have had any experience with either, please let me know.
Thanks Again
Hedge

This is my first post on the forum, thanks for all the great reads over the years. My first African hunt will be next year, but I've lived and worked in West Africa on and off for years, where there is no hunting.

I just bought a brand new Winchester Model 70 Safari Express, the Cape Buffalo Edition from Cabela's (.375 H&H). I haven't fired it yet but wanted to ask a couple questions of the Model 70 enthusiasts:

1. The allegedly free-floating barrel is not free-floated, or at least I...

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As I plan our next adventure, I am thinking of carrying a suppressed 375 h&h or 375 Ruger.
Any advice from you guys who are already doing this?