I'm one of those folks blessed with a left master eye. I'm right handed and I shoot off of the right shoulder. I now use a circular dot mounted on my left shooting glass lense to shift my master eye focus to the right eye.

I've just acquired a nice used SXS hammer gun. My first outing last week at 5 Stand resulted in a straight with the new gun - yes, the gun fits. Now here comes my observation, today I was mounting the gun and noted that without my shooting glasses on that the left rear hammer was shifting my left master eye dominence over to the right eye. We know that some British shooters were having hammer guns built for them well into the 1920's. Could it be that many of these gentlemen also were left eyed dominant. I may have rediscovered something that was common knowledge by hammer gun shooters years ago.