Which 7?

[Terry]

If you were to build a Long Range Benchrest rifle to shoot the new high BC bullets.
Which 7mm cartridge would you use?

 

[Evan]

Clean sheet, not trying to use anything I had? 7 SAUM, but I'd need a new bolt so in real life a 284. I don't like having to mess with fireforming and whatnot, so just a normal 284, not a shehane or modified version.

 

[Terry]

You have to be more specific. How many yards? How many Shots per outing? Unlimited budget? There are many new Brass configurations out there. New usually means more expensive.

1,000 yards, generous budget, 10 shot strings, 50 rounds per match.

 

[RDavies]

1,000 yards, generous budget, 10 shot strings, 50 rounds per match.

If it was going to be fired rapid fire as it usually is in 1000yd BR, then I would likely opt for a 284 Win.
I like the SAUM for F class, but if you are firing a shot every few seconds, I think barrel life would be too short in a 7 SAUM. The 284 has better barrel life, good accuracy and ballistics and is easy to chamber and extract quickly.

 

[Terry]

Thanks

 

[JBT47]

Probably .284 but a .300 WSM may be a better choice