I am sure that you will find that the Webley 700 derived from the pre-war Model 600, which has no screw grip or drop points. My late 1930s catalogue shows the Grade III Model 400 with ejectors selling at £24-0-0 and the Model 600 ejector at £16-0-0. Times were hard after the Depression...

Here in the UK (can't say GB now...) there are a few steel loads for the 2.5" cartridges at standard pressures. I have fired a few of these through the right barrel (3/8 choke) of my 600 with good results, but use Bismuth in the left full choke barrel.

The Superior proof loads at present are only in 2.75" are are unpleasant to fire.

HB