OK, I am a bit of a nerd. I have kept very meticulous records of my shooting for just over 3 decades. Over the past 6 months I have devoted an inordinate amount of time setting up and entering shooting data in SPSS (SPSS is a statistical analysis program for those of you not familiar with the term). I have found the process very enlightening. I found that under typical range conditions, with an AR pastern rifle I can consistently deliver 1.5-2.5 times the mechanical accuracy of the rifle I am using, with a mean of 2 times and a standard deviation of .03; under more practical conditions (stress, less conventional positions, ect.) I consistently deliver 2.4-3.7 times mechanical accuracy with a mean of 3 and a standard deviation of .21. All of that is a very nerdy way of saying that with an AR pastern rifle, with which I can shoot a 1 inch bench rest group at 100 yards, I have a 99.7% chance of hitting a 3.63 inch (call it a nominal 4 inch) target at 100 yards under adverse conditions. In other words, for me, at this point, with an AR pattern rifle, Practical accuracy = Mechanical accuracy x 3.63 (or call it 4 to minimize error variance). This means I can consistently deliver 2.75moa or better accuracy under typical range conditions, and 4moa or better accuracy under most any circumstances, with a 1moa rifle. I am curious how this compares to others. Has anyone else compared their mechanical and practical accuracy in any way? what did you find?