The author uses the 700-footprint action FX7 from Faxon Firearms to build a precision gun.
Gun Digest published the article Building a Precision Rifle with Faxon’s FX7 Action first.

Twin 30BR Score Rifles play Sunday GunDay: Thunder Down Under.
March 16th, 2025 Sunday GunDay: Thunder Down-Under — Twin 30BR Score Rifles This story, from our Gun of the Week Archives, offers a good intro to the 30 BR cartridge,