[quote=eightbore]
According to Mike Yardley. ,who I think would know , he used the Webley 400 for all his clay pigeon shooting and all his game shooting. I have never heard mention of a separate open choked set of barrels and if this was the case they surely would have been mentioned at some point in the discussion of his successes , perhaps you have a source of such information to back up your conclusion.
In the video, David called it a Webley 700. However, if it was built in 1921, it wouldn't be a model 700. The shotgun in the video looks like it has the Screw Grip rib extension. More likely is a customized Proprietary Model 400.
TC