[ QUOTE ]
This maybe a good thread to determine exactly what we call what?
[/ QUOTE ]Might be.
There's one measurement in the shooting sports that has three distinct meanings; minute of angle. Everybody uses one (or more, God forbid) of these.
1. In trigonometry, it's the sine of 1/60th of a degree; about 1.0472.... inch for each hundred yards of range.
2. In the shooting sports, it was standardized years ago as exactly 1 inch for each hundred yards of range.
3. Some folks claim it's exactly what their iron sights say it is regardless of the distance between them and how far the adjustment for part or all on one minute of angle changes the line of sight.
Which means for each unit of change there's at least three interpretations of its actual angular change in the line of sight relative to the bore.