Somewhat larger than US 7. 270/oz per the Brits, while our 7's are 299/oz. I've done a pellet count on that very load (assuming you're talking about the 30 gram/1 1/16th oz variety). Give you almost exactly the same pellet count (280-290) you'd expect in a 1 1/4 oz load of US 6's. I've killed quite a few pheasants with that load.