Very close to the 6.5/284. I built a 6.5/06 once upon a time, Hart #4 and it shot like the dickens. H4831 and the 120 Ballistic Tip made for a fun day at the range.
probably not. too close to the 270, although the 6.5 will outrun it at longer distances, with most high bc bullets. er shaw makes a factory rifle, and a-square sells factory ammo. for some reason the 6.5 hasnt caught on with us Americans and its a shame that it hasnt.