I hunt in cold weather. Ptarmigan north of Fairbanks AK. Dec-Feb count? Chuks at 7k+ in Dec-Feb count? I hunted Sharptails today in a 17 mph north wind and a temp of 11. I use cheap Rawlins baseball gloves. Anything thicker is too difficult to work a double triggered gun and with a single trigger o/u...you sometimes dont let the trigger reset. I dont have circulation problems though like some of you might have. That helps.
The last time I used thick gloves, I had a OR mitten on one hand and a Black Diamond pilot glove on my trigger hand. That was Kansas a couple years ago and it was absolutely stupid outside. Shouldnt have even gone out that day. Plenty of years hunting Nebraska in Dec-Jan with nothing more than a ratty pair of nomex pilot gloves or baseball gloves.

Duck hunting....I wear a thin pair of glacier neoprene gloves. Plenty warm. My decoy gloves are much bulkier and thicker though.