Here's my technique for finding the perfect boots:
1. Set up appointment with local Certified Pedorthist.
2. Buy as many boots as you think you'll like, and you think will fit, before your appointment.
3. Visit Pedorthist. Have him examine your feet and some of your well-worn shoes. Try on all the new boots during the appointment.
4. Return all the ones he rejects and keep the pair he likes. Then buy more of that one, in case they become discontinued.
I did this and brought 4 different brands to my appointment. He cursed one pair, highly praised the quality of another (but rejected them because of the way they fit me), and blessed one of the other two. The pair I kept are Cabela's Instinct Mountain Hiker. They fit my feet the best, and are good quality. These may work for you, but may not. The Pedorthist is the way to go, as he found some residual issues I had from an injury I sustained over 30 years ago and gave me a physical therapy regimen to help prevent injury during my workouts and my hunt.
I heard about this approach on a podcast called Beyond the Kill. The host is Canadian Board-Certified Pedorthist, Adam Janke. He also knows a thing or two about mountain hunting.