Bart B.,
I've read that. The issue is that they are looking only at the small amount of arc at the top, so it doesn't address what we are talking about for extreme cant.
But trust me on the effect of gravity making the points of impact elliptical and not circular. Although a circle is just a special form of an ellipse. The line of bore will make a perfect circle that is centered around the point of impact, and you can easily measure that using a laser bore sighter.
Jimro
I've read that. The issue is that they are looking only at the small amount of arc at the top, so it doesn't address what we are talking about for extreme cant.
But trust me on the effect of gravity making the points of impact elliptical and not circular. Although a circle is just a special form of an ellipse. The line of bore will make a perfect circle that is centered around the point of impact, and you can easily measure that using a laser bore sighter.
Jimro