I too have spent many years freezin to death, I've tried everything and recently got my hands on some wool clothing. I still wear a merino wool set of thermals as a base but this past weekend I was nice and toasty. What I had on: merino wool base, merino wool socks with polypro liner, wool pants(cabelas wooltimate), wool vest(same wooltimate but with wind shear), predator button down shirt, predator jacket, 600 gram rubber boots(hate these beacause of sweaty feet), wool balaclava, wool hat, polypro glove(one hand), hss vest. The key I think after all this time is to layer and layer with wool of some type. I haven't been able to afford it yet but the predator shirt and jacket I have is cotton which I will hopefully replace with additional wool. Shooting ability with this amount of clothing on can be overcome by practising with the clothes you intend to hunt with on. In the past I felt like I was the abonidable snowman trying to keep warm. I gave up on under armour since it made me feel wet and clammy. So if I can solve the cold feet problem and get away from the rubber boots and replace the remaining cotton stuff I have then I believe I've got it whooped! Good luck, hope this was at least somewhat helpful, I know hunting while freezing cold is not that much fun!