That's because the purposely built that rifle for that class simply so they could claim their "factory rifle" could do it.Savage rifles have a good track record shooting F-class matches. They have button rifled barrels according to the Savage web site. For all I know, the Savage F-Class Team's rifles may well have had their barrels air gauged and those with smaller and very uniform groove diameters may have been used. That's what I would do.
It's not a "hunting rifle", and didn't even exist prior to 2005