First off Thinsulate insulation is only good as what is on the bottom of the sole , that is where the cold comes from. Some cheap boot companies put it all on the sides and does nothing for warmth especially sitting. 2) You need the best socks made, these are good brands like Smart wool for hunting warmth, Lorpin ( best) wig wam, no cotton socks ever. Cold transmits though water tens tImes faster so wet sweaty socks chill you feet like a Yeti. 3 ) Never ever heat the outside of your boots with a truck floor heater. This makes your boots sweat from the inside. 4) Boots that breath are warmer because they get the water vapor out of the boot, if you are hiking long distances choose less insulation. 400 with good socks If you are completely still for hours in 30 degrees or less choose a pack boot.with heavy insulation.1200 grams
5) If you are hiking mountains choose a Danner stitch down boot as you can walk steep mountains with no ankle roll.this is imperative if hunting sheep or goats. This is not the pronghorn as it might be the Sierra or similar.
There is not one boot for all hunting. So you really need a couple at the minimum.
IMHO , for gun hunting, Danner Pronghorns 400 w really good socks are great for most cold weather applications under 30. Non insulated with good socks for anything over to 90 degrees.