Which cartridge for a Remy 700 long mag bolt face

This is a Easy button for me !

With all that brass my choice would be the 300 Rum done up for the 245 gr bergers ! Or the 338 Edge !
I have been through a pile of each through the years !
They just flat work ! Easy to tame down .
Just hard for me to run anything else !
You said this would be setting alot in the Safe and maybe passed down later in time .

Rum Man
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Oh, you gotta define a "big 7".

To me, "big 7" are....
7mm LRM
7mm -300 Weatherby
7mm Dakota
7mm RUM
7mm STW
7.21 Lazzeroni Tomahawk ( the WSM version of the Lazzeroni line)
7mm-378 Weatherby
7.21 Lazzeroni Firebird ( think 338 Lapua Magnum necked down to 7mm with an increase in pressure.)

The 7.21 Tomahawk necked to 25 caliber would be a screamer!
Gotta open up the bolt face though.
Please pardon my de-railing, but, What is this 7mm-378 Weatherby........................?
 

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