Norman Brux has been making cut rifled barrels with Ken and Kyle Liebetrau in Lodi, Wisconsin since 2003. Norman's father had bought and stored some barrel making machinery years back; Ken and Norm completed the machines and put them into service, starting Brux barrels.
All barrels are cut with conventional rifling. Most are 4 groove but the .338, .45, and .50 cals are 6 groove. They produced about 1500 barrels in 2010, selling almost exclusively to the consumer and end user. Machinery includes 2 twin spindle riflers, 2 six spindle reamers, and 2 single spindle gun drills.
Brux uses solid carbide cutter hooks and has a slightly different manufacturing process which ensures the barrels are concentric and straight. Its a trade secret so dont ask...
Brux contours can be found HERE, and the main site can be found HERE