I live in the UK, have visited the US a number of times but never had the opportunity to shoot / hunt there much to my chagrin. When I hunt I really like to camp out to maximise outdoor time and to practice skills.
Shoot 300 Wby, 7mm RM, 257 Wby and a few others.
I cannot imagine you wouldn't have already checked this and I am sure you did but I remember not getting my scope rings high enough off the barrel due to a 50 mm objective and before I was told differently ( I'm still learning) I couldn't figure out why I was walking shots all over the paper. I didn't realize even the slightest vibrations could do that to a scope.