Again, Ted . . . no shortage of W&S 700's--certainly more common than other guns from the post-1954 "tons" era--proofed at 3 1/4 tons. They'll handle 1 1/4 oz, although most people will stick with lighter loads, even when hunting--because of the relatively light weight of most Brit guns. The Brits built more "game guns" than they did waterfowlers or pigeon guns. And in their driven shooting game--assuming you're talking typical driven shooting and not the ultra-high birds--you don't even need 1 1/8 oz.

And yes, the BSA is a "higher grade" than your typical BSA. But it's still a BSA. My Webley & Scott Model 400 is the same model with which Percy Stanbury won many shoots in the UK . . . except mine is the much fancier Grade 1, with lovely full coverage small scroll, deeply chiseled fences, etc. And very nice wood. But it's still a Webley & Scott, an unusually nice one no doubt (built on the "screw grip" action) . . . but that won't make it into a Purdey.