I'd try and stay with the right bolt face rather than have it opened up.

In which I'd be lookin' for a .532 like a 7mm mag, 300 win mag, .338, etc.

Thrasher---Do you reload? If not take a look at the prices of 300UM ammo. My pard just sold his 700ss 300UM because, even though he reloads the availabilty of ammo has waned and he was worried that eventually it might become tough to find.

Remington has never been very good at new calibers taking off. Tryfinding SAUM ammo anymore....it was eclipsed by the WSM line and is now "virtually" obsolete.

In either case it's a heck of a round and I wish you the best with your build.