I live near sea level and fly into most of the mountain airports in Colorado often. Telluride being the highest at 10,000. Portable OX will help a lot with improving eyesight since your eyes need a lot of oxygen to function properly and with mental alertness. Both very important during your...
Dehydration in the biggest killer at high elevation. I have used portable oxygen and it will help a lot if you are properly hydrated. Drink a lot of water before, during and after your hunt. I overnight in Telluride a few times a year and have had good success with staying well hydrated...
I just went to a friends personal range and got recurrent shooting my 300 Win Mag. It had been nearly 2 years since I shot it and had to relearn a few basics including properly shouldering the butt (ouch) . Since you have a new gun and are having trouble with grouping, I would start with the...