There is also at least one WR 8 bore rifled choke Explora, a droplock.
This is JMO, but Westley, entered the ball and shot market in earnest after 1900. They designed an ammo system around their rifled choke guns touting them as shooting farther and harder than other ball and shot guns including and especially the Holland Paradox. The 12 bore Super Magnum Explora cartridge has a muzzle energy equal to a 300gr 375HH magnum and approching the 8 dram Holland 10 bore paradox cartridge. They believed they didn't need a 10 bore as the 12 bore SME had it covered in true combo gun 5 lbs lighter than a 10 bore paradox. There might be a 10 out there but it would be rare. Whe Roger Lake's volume II comes out it may shed more light on the subject.
Last edited by PM; 09/22/12 09:33 PM.