Larry,
If it was really cold, I might just load up a 1 1/4 oz #5 load in that Webley. It shouldn't be a big problem, as performance goes down on all loads around zero, and the thing weighs 6 lbs, 10 ozs. Most of my 12s are lighter than that.
One or two a year, in cold weather, wouldn't hurt it. Been doing it for years with my Silver Snipe, a lighter gun.
I'd rather hunt with the 700 than a NID. While it's worth more, it isn't really an expensive gun.
But, it is much nicer than any NID.

Best,
Ted