Guy - I fully understand what scenerio you are talking about. I still say switch him, we have done it a number of times and used to be standard practice when shooting.
Having a shooter use his right hand to shoot and left eye to aim with causes problems, or vice versa. It is not the same as writing as the body recognizes that the hand shooting is natural for the eye that he is using for shooting. It is better all around to hold left handed and shoot left eyed then hold right handed and shoot left eyed. My bet is that after only a few days the shooter will be better at it and his training is less than trying to train a new dominate eye, or chnging his equipment around to force fit a situation. He already shoots left handed long gun, and he only shoots right handed becasue he was forced to shoot cross dominate during prior training.
A far as the barrier, any way ou go you must expose more body as you are exposing more head to see with the left eye as you shoot around the right side of the barrier, and most will expose more body due to this situation.
My thoughts, my opinion, my two cents.
As far as my experience, I first started doing take downs in the 70s. I have been both knuckle dragger and long gunner.
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Hold Hard guys
Rick B.
Knowledge is knowing a tomato is a fruit.
Wisdom is knowing it is great on a hamburger but not so great sticking one up your ass.
Author - Richard.
Experience is what you get right after you need it.
Author unknown.