Surely the Martin Hagn falling block should also be included... available in 4 frame sizes to perfectly fit a given cartridge and a number of improvements over the competition.
Such stunning craftsmanship in a fully finished rifle of course does not come cheap

After returning to Germany in the spring of 1967 Martin worked for Kettner Company in Cologne, Krieghoff in Ulm and Oberhammer in Cologne, to gain more experience. In 1969 Martin achieved his Masters degree in Gunmaking in Munich. From 1970 to 1985 Martin operated his own shop in Germany where he focused on building the Hagn Single Shot rifle of his own design for which he is now well known. He also made stocks for Hartmann & Weiss in Hamburg and custom fitted stocks for Olympic Gold Medalist Conrad Wirnhier. In 1985, Martin moved to Canada and has been building custom rifles ever since. While Martin specializes in his patented single shot in four frame sizes, he also builds custom rifles based on Mauser actions and does custom stock work. In 1986, he joined the American Custom Gunmaker Guild and is also a member of the German Master Gunmaker Guild.

However they ARE available as a bare action at much more affordable prices:

HAGN ACTION- MINI $2,500
Fully Finished in the white. Suitable for calibers 22 Hornet - .222 Rem. - .223 Rem. 1.25 LBS

HAGN ACTION- SMALL $3,300
 Fully finished in the white . Suitable for Calibers up to 7mm Mag. 2.00 LBS

HAGN ACTION- MEDIUM $3,300
 Fully finished in the white . Suitable for Calibers up to 416 Rem. Mag. 2.50 LBS

HAGN ACTION- LARGE $3,500
 Fully finished in the white . Suitable for Calibers up to 600 Nitro 4.00 LBS

http://www.hagnriflesandactions.com/Products.html

http://www.hagnriflesandactions.com/About-Us.html

http://www.hagnriflesandactions.com/Photo-Gallery.html