For many years I used Orvis deerskin shooting gloves--snug and sensitive-- but when the upper midwest got colder, a pair of silk gloveliners slipped on first worked well, and were thin enough so the deerskin outer gloves retained their sensitivity. Below 20, a wool mitten inside a trigger-fingered leather mitten shell on the left hand, and on the right a wool army glove inside the mitten. I still have these, but am outside the US at the moment so can't offer a photo. The mittens were GI, perhaps 50's vintage, made for ski troops. Integral cloth cuffs extended 5" up over the sleeve, and were elasticized. Important to keep the trigger finger leather well Lexoled or otherwise anointed so it stayed flexible.
