I have a Tikka/Valmet 512 U/O double rifle barrels in 9.3x74R and .30-06. A Valmet is usually say $2000 to $3000 on the second hand market and depending on how may barrels. Could be lower than that. One has to find one though, they do come up.

A custom barrelled Valmet 412 (same as the Tikka 512 more or less or Finnclassic) was last month on a US selling site for $5000 with custom .450/400 barrels. A NE fb member enquired about it and may have bought it. I know it made me very interested in making a barrel set similar one day.

A 9.3x74R, the usual maximum for non custom barrels is not a .500 or .470, but still a very worthwhile medium calibre DR. And for say $1500 all up, damned good value.