Odd that it has 2 3/4” chambers and is proofed for 1 1/8 Oz. I wonder if it was made for shooting small shore birds like plover. It certainly has the weight of a heavy fowler. At that weight, 1 1/8 oz loads at moderate velocities will be very comfy to shoot.
In reality, there’s no need for 1 1/4 oz loads even for waterfowl. Even my 1 1/4 oz proofed fowlers, I load up and shoot 1 1/8 oz loads. I’ve been shooting late season mallards and divers with 1 1/8 oz bismuth loads for a few years now when I’m using a vintage gun. Works very well when the distance and choke combo are right.

It’s a very nice WR. I hope the trigger works well.